23131032121 has 8 divisors (see below), whose sum is σ = 23230277000. Its totient is φ = 23031976320.

The previous prime is 23131032109. The next prime is 23131032149. The reversal of 23131032121 is 12123013132.

It can be written as a sum of positive squares in 4 ways, for example, as 5458254400 + 17672777721 = 73880^2 + 132939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23131032121 - 2¹⁷ = 23130901049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131032161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200701 + ... + 294181.

It is an arithmetic number, because the mean of its divisors is an integer number (2903784625).

Almost surely, 2^23131032121 is an apocalyptic number.

It is an amenable number.

23131032121 is a deficient number, since it is larger than the sum of its proper divisors (99244879).

23131032121 is an equidigital number, since it uses as much as digits as its factorization.

23131032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94539.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 23131032121 its reverse (12123013132), we get a palindrome (35254045253).

The spelling of 23131032121 in words is "twenty-three billion, one hundred thirty-one million, thirty-two thousand, one hundred twenty-one".