23324031221 has 4 divisors (see below), whose sum is σ = 23643538572. Its totient is φ = 23004523872.

The previous prime is 23324031209. The next prime is 23324031257. The reversal of 23324031221 is 12213042332.

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 20047728100 + 3276303121 = 141590^2 + 57239^2 .

It is a de Polignac number, because none of the positive numbers 2^k-23324031221 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 (23324031721) 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, 159753566 + ... + 159753711.

It is an arithmetic number, because the mean of its divisors is an integer number (5910884643).

Almost surely, 2^23324031221 is an apocalyptic number.

It is an amenable number.

23324031221 is a deficient number, since it is larger than the sum of its proper divisors (319507351).

23324031221 is an equidigital number, since it uses as much as digits as its factorization.

23324031221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319507350.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 23324031221 its reverse (12213042332), we get a palindrome (35537073553).

The spelling of 23324031221 in words is "twenty-three billion, three hundred twenty-four million, thirty-one thousand, two hundred twenty-one".