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One thousand two hundred and twenty-one

1221 in other numeral systems

Prime factorization of 1221

3 × 11 × 37

Divisors of 1221

1, 3, 11, 33, 37, 111, 407 and 1221

Is 1221 in the Fibonacci number sequence?

No.

Its nearest Fibonacci number neighbors are 987 and 1597.