23113130021 has 4 divisors (see below), whose sum is σ = 23120426700. Its totient is φ = 23105833344.

The previous prime is 23113129979. The next prime is 23113130083. The reversal of 23113130021 is 12003131132.

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 10772364100 + 12340765921 = 103790^2 + 111089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23113130021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23113136021) 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, 3643586 + ... + 3649923.

It is an arithmetic number, because the mean of its divisors is an integer number (5780106675).

Almost surely, 2^23113130021 is an apocalyptic number.

It is an amenable number.

23113130021 is a deficient number, since it is larger than the sum of its proper divisors (7296679).

23113130021 is an equidigital number, since it uses as much as digits as its factorization.

23113130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7296678.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 23113130021 its reverse (12003131132), we get a palindrome (35116261153).

The spelling of 23113130021 in words is "twenty-three billion, one hundred thirteen million, one hundred thirty thousand, twenty-one".