23630443121 has 4 divisors (see below), whose sum is σ = 23682151332. Its totient is φ = 23578734912.

The previous prime is 23630443099. The next prime is 23630443159. The reversal of 23630443121 is 12134403632.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18648906721 + 4981536400 = 136561^2 + 70580^2 .

It is a cyclic number.

It is not a de Polignac number, because 23630443121 - 2²⁶ = 23563334257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23630443181) 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, 25853420 + ... + 25854333.

It is an arithmetic number, because the mean of its divisors is an integer number (5920537833).

Almost surely, 2^23630443121 is an apocalyptic number.

It is an amenable number.

23630443121 is a deficient number, since it is larger than the sum of its proper divisors (51708211).

23630443121 is an equidigital number, since it uses as much as digits as its factorization.

23630443121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51708210.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 23630443121 its reverse (12134403632), we get a palindrome (35764846753).

The spelling of 23630443121 in words is "twenty-three billion, six hundred thirty million, four hundred forty-three thousand, one hundred twenty-one".