23321020321 has 4 divisors (see below), whose sum is σ = 23321327872. Its totient is φ = 23320712772.

The previous prime is 23321020313. The next prime is 23321020357. The reversal of 23321020321 is 12302012332.

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 23321020321 - 2³ = 23321020313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23321026321) 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, 49816 + ... + 221638.

It is an arithmetic number, because the mean of its divisors is an integer number (5830331968).

Almost surely, 2^23321020321 is an apocalyptic number.

It is an amenable number.

23321020321 is a deficient number, since it is larger than the sum of its proper divisors (307551).

23321020321 is a wasteful number, since it uses less digits than its factorization.

23321020321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307550.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 23321020321 its reverse (12302012332), we get a palindrome (35623032653).

The spelling of 23321020321 in words is "twenty-three billion, three hundred twenty-one million, twenty thousand, three hundred twenty-one".