23213331221 has 8 divisors (see below), whose sum is σ = 23459111424. Its totient is φ = 22967683200.

The previous prime is 23213331191. The next prime is 23213331227. The reversal of 23213331221 is 12213331232.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23213331221 - 2⁶ = 23213331157 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 (23213331227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342476 + ... + 404618.

It is an arithmetic number, because the mean of its divisors is an integer number (2932388928).

Almost surely, 2^23213331221 is an apocalyptic number.

It is an amenable number.

23213331221 is a deficient number, since it is larger than the sum of its proper divisors (245780203).

23213331221 is an equidigital number, since it uses as much as digits as its factorization.

23213331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66091.

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

Adding to 23213331221 its reverse (12213331232), we get a palindrome (35426662453).

The spelling of 23213331221 in words is "twenty-three billion, two hundred thirteen million, three hundred thirty-one thousand, two hundred twenty-one".