121152531 has 16 divisors (see below), whose sum is σ = 170992640. Its totient is φ = 76088160.

The previous prime is 121152509. The next prime is 121152553. The reversal of 121152531 is 135251121.

It is an interprime number because it is at equal distance from previous prime (121152509) and next prime (121152553).

It is not a de Polignac number, because 121152531 - 2⁷ = 121152403 is a prime.

It is a super-2 number, since 2×121152531² = 29355871535411922, 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 = 121152498 and 121152507.

It is not an unprimeable number, because it can be changed into a prime (121152571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4446 + ... + 16188.

It is an arithmetic number, because the mean of its divisors is an integer number (10687040).

Almost surely, 2^121152531 is an apocalyptic number.

121152531 is a deficient number, since it is larger than the sum of its proper divisors (49840109).

121152531 is a wasteful number, since it uses less digits than its factorization.

121152531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11946.

The product of its digits is 300, while the sum is 21.

The square root of 121152531 is about 11006.9310436652. The cubic root of 121152531 is about 494.8164894700.

The spelling of 121152531 in words is "one hundred twenty-one million, one hundred fifty-two thousand, five hundred thirty-one".