23500391121 has 24 divisors (see below), whose sum is σ = 34058700000. Its totient is φ = 15614528832.

The previous prime is 23500391069. The next prime is 23500391143. The reversal of 23500391121 is 12119300532.

23500391121 is a `hidden beast` number, since 2 + 3 + 500 + 39 + 1 + 121 = 666.

It is not a de Polignac number, because 23500391121 - 2²⁵ = 23466836689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23500391821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5515690 + ... + 5519948.

It is an arithmetic number, because the mean of its divisors is an integer number (1419112500).

Almost surely, 2^23500391121 is an apocalyptic number.

It is an amenable number.

23500391121 is a deficient number, since it is larger than the sum of its proper divisors (10558308879).

23500391121 is a wasteful number, since it uses less digits than its factorization.

23500391121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6173 (or 6170 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

Adding to 23500391121 its reverse (12119300532), we get a palindrome (35619691653).

The spelling of 23500391121 in words is "twenty-three billion, five hundred million, three hundred ninety-one thousand, one hundred twenty-one".