Q: Is 128,111 a Prime Number?
A: Yes, 128,111 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 128111 can be evenly divided by 1 and 128,111, with no remainder.
Since 128,111 can be divided by just 1 and 128,111, it is a prime number.