23131232112 has 160 divisors (see below), whose sum is σ = 63083390976. Its totient is φ = 7289497600.

The previous prime is 23131232093. The next prime is 23131232123. The reversal of 23131232112 is 21123213132.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53668537 + ... + 53668967.

Almost surely, 2^23131232112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23131232112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31541695488).

23131232112 is an abundant number, since it is smaller than the sum of its proper divisors (39952158864).

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

23131232112 is a wasteful number, since it uses less digits than its factorization.

23131232112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 913 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

Adding to 23131232112 its reverse (21123213132), we get a palindrome (44254445244).

The spelling of 23131232112 in words is "twenty-three billion, one hundred thirty-one million, two hundred thirty-two thousand, one hundred twelve".