12150621531 has 24 divisors (see below), whose sum is σ = 18655672464. Its totient is φ = 7594229760.

The previous prime is 12150621491. The next prime is 12150621563. The reversal of 12150621531 is 13512605121.

12150621531 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 0 + 621 + 5 + 31 = 666.

It is not a de Polignac number, because 12150621531 - 2⁷ = 12150621403 is a prime.

It is a super-2 number, since 2×12150621531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12150621495 and 12150621504.

It is not an unprimeable number, because it can be changed into a prime (12150621331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115185 + ... + 193826.

It is an arithmetic number, because the mean of its divisors is an integer number (777319686).

Almost surely, 2^12150621531 is an apocalyptic number.

12150621531 is a deficient number, since it is larger than the sum of its proper divisors (6505050933).

12150621531 is a wasteful number, since it uses less digits than its factorization.

12150621531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309291 (or 309288 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The spelling of 12150621531 in words is "twelve billion, one hundred fifty million, six hundred twenty-one thousand, five hundred thirty-one".