it's a number it looks like this: 10^10^100 and googolplex is a number it is higher than the number of hydrogen atoms in the observable universe! scientist use googol for rocket science!
EDIT:
10^10^100 is a googolplex, not a googol.
A googol is 10^100 whereas a googolplex is 10^googol
Its use, however, has no mathematical significance. A googol was pretty much invented for fun by a mere 9-year old.
Oh, dude, a googol times a googol is basically a googol multiplied by a googol. And a googol is like 10 to the power of 100, so when you multiply that by another googol, you're basically getting a number that's like really, really big. Like, so big you probably won't ever need to use it in real life.
googol is the number 1 follwed by 100 ie 10 power of 100
2 googol
googol and one, googol and two, googol and three...
There are (googol+1) of them.
Googol can be written as googol or 10^100.
One googol and one would be next after one googol.
A googol one, googol two, googol three, ...
A googol has 100 zeros. A googolplex has a googol of zeros. 1 googol is 10100. A googolplex is 10googol .
A googol is 1 * 10^100. a googol times a googol is: 1 * 10^100 * 1 * 10^100 = 10^100 * 10^100 = 10 ^ (100 + 100) = 10^200. Therefore a googol times a googol will have 200 zeros in it.
Since one googol equals 10100 (1 followed by 100 zeros), googol times googol equals 101000 (1 followed by 1,000 zeros).
Googol is defined as 10100