12312432131 has 4 divisors (see below), whose sum is σ = 12331581192. Its totient is φ = 12293283072.

The previous prime is 12312432101. The next prime is 12312432157. The reversal of 12312432131 is 13123421321.

12312432131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12312432131 - 2²⁶ = 12245323267 is a prime.

It is a super-2 number, since 2×12312432131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312432097 and 12312432106.

It is not an unprimeable number, because it can be changed into a prime (12312432101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9573566 + ... + 9574851.

It is an arithmetic number, because the mean of its divisors is an integer number (3082895298).

Almost surely, 2^12312432131 is an apocalyptic number.

12312432131 is a deficient number, since it is larger than the sum of its proper divisors (19149061).

12312432131 is an equidigital number, since it uses as much as digits as its factorization.

12312432131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19149060.

The product of its digits is 864, while the sum is 23.

Adding to 12312432131 its reverse (13123421321), we get a palindrome (25435853452).

The spelling of 12312432131 in words is "twelve billion, three hundred twelve million, four hundred thirty-two thousand, one hundred thirty-one".