23012431221 has 32 divisors (see below), whose sum is σ = 34146911232. Its totient is φ = 13689607680.

The previous prime is 23012431199. The next prime is 23012431313. The reversal of 23012431221 is 12213421032.

It is not a de Polignac number, because 23012431221 - 2¹¹ = 23012429173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23012436221) 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, 1142191 + ... + 1162163.

It is an arithmetic number, because the mean of its divisors is an integer number (1067090976).

Almost surely, 2^23012431221 is an apocalyptic number.

It is an amenable number.

23012431221 is a deficient number, since it is larger than the sum of its proper divisors (11134480011).

23012431221 is a wasteful number, since it uses less digits than its factorization.

23012431221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20973.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 23012431221 its reverse (12213421032), we get a palindrome (35225852253).

The spelling of 23012431221 in words is "twenty-three billion, twelve million, four hundred thirty-one thousand, two hundred twenty-one".