23211220113 has 40 divisors (see below), whose sum is σ = 37091871432. Its totient is φ = 14413676544.

The previous prime is 23211220111. The next prime is 23211220133. The reversal of 23211220113 is 31102211232.

It can be written as a sum of positive squares in 4 ways, for example, as 1380271104 + 21830949009 = 37152^2 + 147753^2 .

It is not a de Polignac number, because 23211220113 - 2¹ = 23211220111 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23211220111) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 46681 + ... + 220457.

Almost surely, 2^23211220113 is an apocalyptic number.

It is an amenable number.

23211220113 is a deficient number, since it is larger than the sum of its proper divisors (13880651319).

23211220113 is a wasteful number, since it uses less digits than its factorization.

23211220113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173903 (or 173894 counting only the distinct ones).

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

Adding to 23211220113 its reverse (31102211232), we get a palindrome (54313431345).

The spelling of 23211220113 in words is "twenty-three billion, two hundred eleven million, two hundred twenty thousand, one hundred thirteen".