23131102121 has 4 divisors (see below), whose sum is σ = 23355676032. Its totient is φ = 22906528212.

The previous prime is 23131102103. The next prime is 23131102193. The reversal of 23131102121 is 12120113132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23131102121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23131102121.

It is not an unprimeable number, because it can be changed into a prime (23131102021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112286801 + ... + 112287006.

It is an arithmetic number, because the mean of its divisors is an integer number (5838919008).

Almost surely, 2^23131102121 is an apocalyptic number.

It is an amenable number.

23131102121 is a deficient number, since it is larger than the sum of its proper divisors (224573911).

23131102121 is a wasteful number, since it uses less digits than its factorization.

23131102121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224573910.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 23131102121 its reverse (12120113132), we get a palindrome (35251215253).

The spelling of 23131102121 in words is "twenty-three billion, one hundred thirty-one million, one hundred two thousand, one hundred twenty-one".