It is a composite number.
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it is composite. Note that the sum of the digits is 3+2+1=6 and since this is a multiple of 3, we know that 3 is a factor of 321. in fact, 321 divided by 3 is 107
321 is a composite number because it has more than two factors
The number is not COMPOSITE. Instead, it is a prime number.
Composite (the only even number that is prime is2).
Composite