121567131 has 12 divisors (see below), whose sum is σ = 200682352. Its totient is φ = 69466896.

The previous prime is 121567099. The next prime is 121567139. The reversal of 121567131 is 131765121.

It is not a de Polignac number, because 121567131 - 2⁵ = 121567099 is a prime.

It is a super-2 number, since 2×121567131² = 29557134679142322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121567095 and 121567104.

It is not an unprimeable number, because it can be changed into a prime (121567139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 964756 + ... + 964881.

Almost surely, 2^121567131 is an apocalyptic number.

121567131 is a deficient number, since it is larger than the sum of its proper divisors (79115221).

121567131 is a wasteful number, since it uses less digits than its factorization.

121567131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929650 (or 1929647 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 121567131 is about 11025.7485460172. The cubic root of 121567131 is about 495.3802893369.

The spelling of 121567131 in words is "one hundred twenty-one million, five hundred sixty-seven thousand, one hundred thirty-one".