Q: Is 121,191 a Prime Number?
A: No, 121,191 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 121191 can be evenly divided by 1 3 7 21 29 87 199 203 597 609 1,393 4,179 5,771 17,313 40,397 and 121,191, with no remainder.
Since 121,191 cannot be divided by just 1 and 121,191, it is not a prime number.