23321312321 has 4 divisors (see below), whose sum is σ = 23359110852. Its totient is φ = 23283513792.

The previous prime is 23321312299. The next prime is 23321312341. The reversal of 23321312321 is 12321312332.

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 13633831696 + 9687480625 = 116764^2 + 98425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23321312321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23321312341) 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, 18898340 + ... + 18899573.

It is an arithmetic number, because the mean of its divisors is an integer number (5839777713).

Almost surely, 2^23321312321 is an apocalyptic number.

It is an amenable number.

23321312321 is a deficient number, since it is larger than the sum of its proper divisors (37798531).

23321312321 is an equidigital number, since it uses as much as digits as its factorization.

23321312321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37798530.

The product of its digits is 1296, while the sum is 23.

Adding to 23321312321 its reverse (12321312332), we get a palindrome (35642624653).

The spelling of 23321312321 in words is "twenty-three billion, three hundred twenty-one million, three hundred twelve thousand, three hundred twenty-one".