Is 111 a prime number?

No, 111 is not a prime number. It is a composite number: its digits add up to 3, which is divisible by 3, so 111 is divisible by 3.

Why 111 is not prime

111 has divisors other than 1 and itself. The smallest is 3: 111 ÷ 3 = 37.

Prime factorization: 111 = 3 × 37.

Quick facts about 111

• Even or odd: odd.
• Nearest primes: 109 below and 113 above.
• Primes up to 111: 29.

Is it prime? Nearby numbers

More about 111: factors of 111 · 111 squared · square root of 111 · 111 in binary · 111 in Roman numerals.

Another number? Use the prime number checker for any value, or see the list of prime numbers.