231244012131 has 16 divisors (see below), whose sum is σ = 339331524480. Its totient is φ = 138907637120.

The previous prime is 231244012127. The next prime is 231244012141. The reversal of 231244012131 is 131210442132.

It is a cyclic number.

It is not a de Polignac number, because 231244012131 - 2² = 231244012127 is a prime.

It is a super-2 number, since 2×231244012131² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231244012121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31002441 + ... + 31009898.

It is an arithmetic number, because the mean of its divisors is an integer number (21208220280).

Almost surely, 2^231244012131 is an apocalyptic number.

231244012131 is a deficient number, since it is larger than the sum of its proper divisors (108087512349).

231244012131 is a wasteful number, since it uses less digits than its factorization.

231244012131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62012466.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 231244012131 its reverse (131210442132), we get a palindrome (362454454263).

The spelling of 231244012131 in words is "two hundred thirty-one billion, two hundred forty-four million, twelve thousand, one hundred thirty-one".