121560131 has 12 divisors (see below), whose sum is σ = 154262520. Its totient is φ = 94721760.

The previous prime is 121560113. The next prime is 121560137. The reversal of 121560131 is 131065121.

It is not a de Polignac number, because 121560131 - 2¹⁰ = 121559107 is a prime.

It is a super-2 number, since 2×121560131² = 29553730897474322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121560137) 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, 112226 + ... + 113303.

It is an arithmetic number, because the mean of its divisors is an integer number (12855210).

Almost surely, 2^121560131 is an apocalyptic number.

121560131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121560131 is a deficient number, since it is larger than the sum of its proper divisors (32702389).

121560131 is a wasteful number, since it uses less digits than its factorization.

121560131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225554 (or 225547 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 121560131 is about 11025.4311026826. The cubic root of 121560131 is about 495.3707809318.

The spelling of 121560131 in words is "one hundred twenty-one million, five hundred sixty thousand, one hundred thirty-one".