231131133112 has 32 divisors (see below), whose sum is σ = 479426947200. Its totient is φ = 103579890400.

The previous prime is 231131133091. The next prime is 231131133143. The reversal of 231131133112 is 211331131132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18490162 + ... + 18502657.

It is an arithmetic number, because the mean of its divisors is an integer number (14982092100).

Almost surely, 2^231131133112 is an apocalyptic number.

231131133112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231131133112 is an abundant number, since it is smaller than the sum of its proper divisors (248295814088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231131133112 is a wasteful number, since it uses less digits than its factorization.

231131133112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36992907 (or 36992903 counting only the distinct ones).

The product of its digits is 324, while the sum is 22.

Adding to 231131133112 its reverse (211331131132), we get a palindrome (442462264244).

The spelling of 231131133112 in words is "two hundred thirty-one billion, one hundred thirty-one million, one hundred thirty-three thousand, one hundred twelve".