23131113012 has 36 divisors (see below), whose sum is σ = 66823216096. Its totient is φ = 6608889360.

The previous prime is 23131113001. The next prime is 23131113037. The reversal of 23131113012 is 21031113132.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45894814 + ... + 45895317.

Almost surely, 2^23131113012 is an apocalyptic number.

It is an amenable number.

23131113012 is an abundant number, since it is smaller than the sum of its proper divisors (43692103084).

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

23131113012 is a wasteful number, since it uses less digits than its factorization.

23131113012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91790148 (or 91790143 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 23131113012 its reverse (21031113132), we get a palindrome (44162226144).

The spelling of 23131113012 in words is "twenty-three billion, one hundred thirty-one million, one hundred thirteen thousand, twelve".