Q: Is 121,357 a Prime Number?
A: Yes, 121,357 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 121357 can be evenly divided by 1 and 121,357, with no remainder.
Since 121,357 can be divided by just 1 and 121,357, it is a prime number.