23312223221 has 4 divisors (see below), whose sum is σ = 26642540832. Its totient is φ = 19981905612.

The previous prime is 23312223211. The next prime is 23312223227. The reversal of 23312223221 is 12232221332.

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 23312223221 - 2⁶ = 23312223157 is a prime.

It is a super-2 number, since 2×23312223221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23312223227) 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, 1665158795 + ... + 1665158808.

It is an arithmetic number, because the mean of its divisors is an integer number (6660635208).

Almost surely, 2^23312223221 is an apocalyptic number.

It is an amenable number.

23312223221 is a deficient number, since it is larger than the sum of its proper divisors (3330317611).

23312223221 is an equidigital number, since it uses as much as digits as its factorization.

23312223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3330317610.

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

Adding to 23312223221 its reverse (12232221332), we get a palindrome (35544444553).

The spelling of 23312223221 in words is "twenty-three billion, three hundred twelve million, two hundred twenty-three thousand, two hundred twenty-one".