23131221201 has 12 divisors (see below), whose sum is σ = 36449197200. Its totient is φ = 14018921880.

The previous prime is 23131221163. The next prime is 23131221209. The reversal of 23131221201 is 10212213132.

23131221201 is a `hidden beast` number, since 231 + 312 + 2 + 120 + 1 = 666.

It is not a de Polignac number, because 23131221201 - 2¹⁵ = 23131188433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23131221209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116824251 + ... + 116824448.

It is an arithmetic number, because the mean of its divisors is an integer number (3037433100).

Almost surely, 2^23131221201 is an apocalyptic number.

It is an amenable number.

23131221201 is a deficient number, since it is larger than the sum of its proper divisors (13317975999).

23131221201 is a wasteful number, since it uses less digits than its factorization.

23131221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233648716 (or 233648713 counting only the distinct ones).

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

Adding to 23131221201 its reverse (10212213132), we get a palindrome (33343434333).

The spelling of 23131221201 in words is "twenty-three billion, one hundred thirty-one million, two hundred twenty-one thousand, two hundred one".