Milion korun je hodně peněz.

The verb agrees with milion, not with korun.

In Milion korun je hodně peněz, the grammatical head of the subject is milion = million, which is singular. So Czech uses je = is.

A helpful way to think about it is:

• milion = the main noun
• korun = dependent noun, meaning of crowns

So the structure is basically A million of crowns is a lot of money.

This is similar to English, where A million crowns is a lot of money also sounds natural when we mean one total amount.

Because after milion, Czech normally uses the genitive plural of the counted noun.

The base noun is:

• koruna = crown / koruna

Its genitive plural form is:

• korun

So:

• milion korun = a million crowns

This is a very common pattern with quantity words and large numbers:

• sto korun = one hundred crowns
• tisíc korun = one thousand crowns
• milion korun = one million crowns

So korun is not random; it is the required case form after a quantity expression like milion.

Because hodně requires the genitive.

The basic dictionary form is:

• peníze = money

But after quantity words like hodně = a lot of, Czech uses the genitive:

• hodně peněz = a lot of money

So:

• peníze = money
• peněz = of money / money in the genitive after a quantity expression

You see the same pattern in other phrases too:

• hodně času = a lot of time
• hodně lidí = a lot of people
• hodně práce = a lot of work

Here hodně means a lot of.

It is an indeclinable quantity word, so it does not change its ending to match nouns. That is why you do not get adjective-style agreement.

So:

• hodně peněz = a lot of money

Be careful not to confuse it with forms of hodný, which is a completely different word meaning kind, good, or well-behaved.

For example:

• hodný člověk = a kind person
• hodně peněz = a lot of money

Those are different words, even though they look similar.

Because they mean two different things.

• korun refers to a specific currency unit: crowns / korunas
• peněz means money in a general sense

So the sentence is structured like this:

• Milion korun = a million crowns
• je hodně peněz = is a lot of money

In other words, the sentence says that a specific amount in a specific currency counts as a large amount of money in general.

In normal modern Czech, peníze is treated as a plural-only noun.

That means Czech uses plural forms where English uses the uncountable word money.

So Czech says things like:

• Mám peníze. = I have money.
• Nemám peníze. = I don’t have money.
• Kolik máš peněz? = How much money do you have?

There is a singular form peníz, but in modern Czech it usually means coin or sounds old-fashioned. It is not the normal everyday word for money as a general concept.

Because Czech has no articles like English a, an, or the.

So Milion korun can mean:

• a million crowns
• one million crowns

The exact interpretation depends on context.

Czech simply does not need a separate article word here. That is completely normal.

Yes, that is grammatical.

But in normal Czech, jeden is often left out unless you want emphasis, contrast, or extra precision.

So:

• Milion korun je hodně peněz. = the most natural neutral version
• Jeden milion korun je hodně peněz. = possible, but slightly more explicit or emphatic

You might use jeden if you are contrasting numbers:

• Jeden milion korun je hodně peněz, ale dva miliony jsou ještě víc.

Yes, Czech word order is flexible, but the basic neutral order here is:

• Milion korun je hodně peněz.

That is the most natural version for a plain statement.

You may also hear:

• Milion korun, to je hodně peněz.

This sounds a bit more conversational, like A million crowns — that’s a lot of money.

So the order can change, but different orders usually change the emphasis or style rather than the core meaning.