121535131 has 2 divisors, whose sum is σ = 121535132. Its totient is φ = 121535130.

The previous prime is 121535123. The next prime is 121535177. The reversal of 121535131 is 131535121.

It is a weak prime.

It is an emirp because it is prime and its reverse (131535121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121535131 - 2³ = 121535123 is a prime.

It is a super-2 number, since 2×121535131² = 29541576134374322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121535831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60767565 + 60767566.

It is an arithmetic number, because the mean of its divisors is an integer number (60767566).

Almost surely, 2^121535131 is an apocalyptic number.

121535131 is a deficient number, since it is larger than the sum of its proper divisors (1).

121535131 is an equidigital number, since it uses as much as digits as its factorization.

121535131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 450, while the sum is 22.

The square root of 121535131 is about 11024.2973018692. The cubic root of 121535131 is about 495.3368193621.

The spelling of 121535131 in words is "one hundred twenty-one million, five hundred thirty-five thousand, one hundred thirty-one".