121923531 has 12 divisors (see below), whose sum is σ = 177235552. Its totient is φ = 80763696.

The previous prime is 121923521. The next prime is 121923539. The reversal of 121923531 is 135329121.

121923531 is a `hidden beast` number, since 121 + 9 + 2 + 3 + 531 = 666.

It is not a de Polignac number, because 121923531 - 2²¹ = 119826379 is a prime.

It is a super-2 number, since 2×121923531² = 29730694823015922, 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 = 121923495 and 121923504.

It is not an unprimeable number, because it can be changed into a prime (121923539) 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, 41731 + ... + 44556.

Almost surely, 2^121923531 is an apocalyptic number.

121923531 is a deficient number, since it is larger than the sum of its proper divisors (55312021).

121923531 is a wasteful number, since it uses less digits than its factorization.

121923531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86450 (or 86447 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 121923531 is about 11041.8988856084. The cubic root of 121923531 is about 495.8639213827.

The spelling of 121923531 in words is "one hundred twenty-one million, nine hundred twenty-three thousand, five hundred thirty-one".