21231321200022 has 16 divisors (see below), whose sum is σ = 43158751292592. Its totient is φ = 6961088917920.

The previous prime is 21231321200021. The next prime is 21231321200039. The reversal of 21231321200022 is 22000212313212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231321200021) 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, 29004536793 + ... + 29004537524.

It is an arithmetic number, because the mean of its divisors is an integer number (2697421955787).

Almost surely, 2^{21231321200022} is an apocalyptic number.

21231321200022 is an abundant number, since it is smaller than the sum of its proper divisors (21927430092570).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21231321200022 is a wasteful number, since it uses less digits than its factorization.

21231321200022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58009074383.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21231321200022 its reverse (22000212313212), we get a palindrome (43231533513234).

The spelling of 21231321200022 in words is "twenty-one trillion, two hundred thirty-one billion, three hundred twenty-one million, two hundred thousand, twenty-two".