20100 + 2010 = 22110.
20100 is an integer, not a fraction. There is not really a sensible way of writing it as a fraction. However, if you must, you can use 20100/1.
20100 simplified is 20100. This means that the number itself cannot be simplified further because it is already in its simplest form.
4020
It is 2010000%
Error Code 20100 is usually on the Nintendo Wii. It means that your Wii is unable to connect to the Internet.
20100
20100
20100
-1
30300
20100 comes after 20099.
If you are looking at them as integer number, no.