23120023021 has 4 divisors (see below), whose sum is σ = 23120331712. Its totient is φ = 23119714332.

The previous prime is 23120023013. The next prime is 23120023037. The reversal of 23120023021 is 12032002132.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 23120023021 - 2³ = 23120023013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23120022986 and 23120023004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23120023081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37420 + ... + 218266.

It is an arithmetic number, because the mean of its divisors is an integer number (5780082928).

Almost surely, 2^23120023021 is an apocalyptic number.

It is an amenable number.

23120023021 is a deficient number, since it is larger than the sum of its proper divisors (308691).

23120023021 is a wasteful number, since it uses less digits than its factorization.

23120023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308690.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 23120023021 its reverse (12032002132), we get a palindrome (35152025153).

The spelling of 23120023021 in words is "twenty-three billion, one hundred twenty million, twenty-three thousand, twenty-one".