23311123221 has 32 divisors (see below), whose sum is σ = 32550416640. Its totient is φ = 14826124800.

The previous prime is 23311123217. The next prime is 23311123229. The reversal of 23311123221 is 12232111332.

It is not a de Polignac number, because 23311123221 - 2² = 23311123217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23311123229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1289040 + ... + 1306998.

It is an arithmetic number, because the mean of its divisors is an integer number (1017200520).

Almost surely, 2^23311123221 is an apocalyptic number.

It is an amenable number.

23311123221 is a deficient number, since it is larger than the sum of its proper divisors (9239293419).

23311123221 is a wasteful number, since it uses less digits than its factorization.

23311123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18237.

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

Adding to 23311123221 its reverse (12232111332), we get a palindrome (35543234553).

The spelling of 23311123221 in words is "twenty-three billion, three hundred eleven million, one hundred twenty-three thousand, two hundred twenty-one".