Is 121 a prime number?
Prime Number Checker
Is 121 a prime or composite number?
Answer
Number 121 is not a Prime
121 = 11²
121 has 3 divisors — 1, 11 and 121; a prime has exactly two: 1 and itself. It is a perfect square.
Primes up to √121
11² = 121 ≤ 121 < 144 = 12², so it is enough to try primes up to 11
- ÷2 does not divide
- ÷3 does not divide
- ÷5 does not divide
- ÷7 does not divide
- ÷11 divides
121 ÷ 11 = 11 — 11 divides 121, so 121 is composite
Nearest primes: 113 and 127
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See Also
- Factors of a Number - List all Factors and Factor Pairs of a Number
- Prime Factorization - Prime Factorization Calculator
- Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between
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