20323222013221 has 16 divisors (see below), whose sum is σ = 20386450344960. Its totient is φ = 20260098483840.

The previous prime is 20323222013197. The next prime is 20323222013251. The reversal of 20323222013221 is 12231022232302.

It is a cyclic number.

It is not a de Polignac number, because 20323222013221 - 2⁵ = 20323222013189 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 (20323222013251) 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, 2016387660 + ... + 2016397738.

It is an arithmetic number, because the mean of its divisors is an integer number (1274153146560).

Almost surely, 2^{20323222013221} is an apocalyptic number.

It is an amenable number.

20323222013221 is a deficient number, since it is larger than the sum of its proper divisors (63228331739).

20323222013221 is a wasteful number, since it uses less digits than its factorization.

20323222013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14676.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 20323222013221 its reverse (12231022232302), we get a palindrome (32554244245523).

The spelling of 20323222013221 in words is "twenty trillion, three hundred twenty-three billion, two hundred twenty-two million, thirteen thousand, two hundred twenty-one".