23330321021 has 4 divisors (see below), whose sum is σ = 26663224032. Its totient is φ = 19997418012.

The previous prime is 23330321011. The next prime is 23330321081. The reversal of 23330321021 is 12012303332.

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.

It is a cyclic number.

It is not a de Polignac number, because 23330321021 - 2²⁶ = 23263212157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23330320984 and 23330321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23330321011) 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, 1666451495 + ... + 1666451508.

It is an arithmetic number, because the mean of its divisors is an integer number (6665806008).

Almost surely, 2^23330321021 is an apocalyptic number.

It is an amenable number.

23330321021 is a deficient number, since it is larger than the sum of its proper divisors (3332903011).

23330321021 is an equidigital number, since it uses as much as digits as its factorization.

23330321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3332903010.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 23330321021 its reverse (12012303332), we get a palindrome (35342624353).

The spelling of 23330321021 in words is "twenty-three billion, three hundred thirty million, three hundred twenty-one thousand, twenty-one".