10000.00

Is it correct to write ten t y in such a number: 10,000,000.00?

Ten thousand and you can write 10,000

10,0000.00 (with commas and two z's) is unnecessary and it appears that you have entered ten US dollars.

Write the number correctly

10000.00

Generally, every 3rd comma is placed to the right and left of the comma to be readable. For example, at first glance, I don't know what this number is:
4823482347
But if the disinfection is placed in group 3:
4 823 482 347
I can easily say that it is 4.8 billion.
Zero is usually excluded to the right of the hostile point. 4000 can be reduced to 4 and 00004 to 4.
Sometimes computer software is not designed to group or omit data locations so that you can see 10,0000.00 in the output of a computer program.
10,000.00 is still the correct spelling of ten thousand, but it is usually the spelling of 10,000.
This number is probably from a calculator, so the comma is excluded. It is common to use a comma, but Z is not necessary after a comma.
Commas are appropriate but not necessary.