Q: Is 21,203 a Prime Number?
A: No, 21,203 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 21203 can be evenly divided by 1 7 13 91 233 1,631 3,029 and 21,203, with no remainder.
Since 21,203 cannot be divided by just 1 and 21,203, it is not a prime number.