23131212231112 has 8 divisors (see below), whose sum is σ = 43371022933350. Its totient is φ = 11565606115552.

The previous prime is 23131212231109. The next prime is 23131212231137. The reversal of 23131212231112 is 21113221213132.

It can be written as a sum of positive squares in only one way, i.e., 22829035544676 + 302176686436 = 4777974^2 + 549706^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1445700764437 + ... + 1445700764452.

Almost surely, 2^{23131212231112} is an apocalyptic number.

It is an amenable number.

23131212231112 is a deficient number, since it is larger than the sum of its proper divisors (20239810702238).

23131212231112 is a wasteful number, since it uses less digits than its factorization.

23131212231112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891401528895 (or 2891401528891 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

Adding to 23131212231112 its reverse (21113221213132), we get a palindrome (44244433444244).

The spelling of 23131212231112 in words is "twenty-three trillion, one hundred thirty-one billion, two hundred twelve million, two hundred thirty-one thousand, one hundred twelve".