23313121221 has 8 divisors (see below), whose sum is σ = 33475251040. Its totient is φ = 14346536112.

The previous prime is 23313121219. The next prime is 23313121229. The reversal of 23313121221 is 12212131332.

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

It is not a de Polignac number, because 23313121221 - 2¹ = 23313121219 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 (23313121229) 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, 298886131 + ... + 298886208.

It is an arithmetic number, because the mean of its divisors is an integer number (4184406380).

Almost surely, 2^23313121221 is an apocalyptic number.

It is an amenable number.

23313121221 is a deficient number, since it is larger than the sum of its proper divisors (10162129819).

23313121221 is a wasteful number, since it uses less digits than its factorization.

23313121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597772355.

The product of its digits is 432, while the sum is 21.

Adding to 23313121221 its reverse (12212131332), we get a palindrome (35525252553).

The spelling of 23313121221 in words is "twenty-three billion, three hundred thirteen million, one hundred twenty-one thousand, two hundred twenty-one".