23221203213 has 16 divisors (see below), whose sum is σ = 34792974720. Its totient is φ = 13668667584.

The previous prime is 23221203197. The next prime is 23221203289. The reversal of 23221203213 is 31230212232.

It is a happy number.

It is not a de Polignac number, because 23221203213 - 2⁴ = 23221203197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23221203213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23221203013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12942918 + ... + 12944711.

It is an arithmetic number, because the mean of its divisors is an integer number (2174560920).

Almost surely, 2^23221203213 is an apocalyptic number.

23221203213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

23221203213 is a deficient number, since it is larger than the sum of its proper divisors (11571771507).

23221203213 is a wasteful number, since it uses less digits than its factorization.

23221203213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25887668.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 23221203213 its reverse (31230212232), we get a palindrome (54451415445).

The spelling of 23221203213 in words is "twenty-three billion, two hundred twenty-one million, two hundred three thousand, two hundred thirteen".