23012121231 has 24 divisors (see below), whose sum is σ = 36522420480. Its totient is φ = 13846395600.

The previous prime is 23012121203. The next prime is 23012121233. The reversal of 23012121231 is 13212121032.

It is not a de Polignac number, because 23012121231 - 2⁵ = 23012121199 is a prime.

It is a super-2 number, since 2×23012121231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012121233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 822375 + ... + 849896.

It is an arithmetic number, because the mean of its divisors is an integer number (1521767520).

Almost surely, 2^23012121231 is an apocalyptic number.

23012121231 is a deficient number, since it is larger than the sum of its proper divisors (13510299249).

23012121231 is a wasteful number, since it uses less digits than its factorization.

23012121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672427 (or 1672424 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23012121231 its reverse (13212121032), we get a palindrome (36224242263).

The spelling of 23012121231 in words is "twenty-three billion, twelve million, one hundred twenty-one thousand, two hundred thirty-one".