21230312021022 has 32 divisors (see below), whose sum is σ = 45926506392480. Its totient is φ = 6503877912960.

The previous prime is 21230312020991. The next prime is 21230312021041. The reversal of 21230312021022 is 22012021303212.

It is a super-2 number, since 2×21230312021022² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21230312021022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594269229 + ... + 594304952.

It is an arithmetic number, because the mean of its divisors is an integer number (1435203324765).

Almost surely, 2^{21230312021022} is an apocalyptic number.

21230312021022 is an abundant number, since it is smaller than the sum of its proper divisors (24696194371458).

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

21230312021022 is a wasteful number, since it uses less digits than its factorization.

21230312021022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188574428.

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

Adding to 21230312021022 its reverse (22012021303212), we get a palindrome (43242333324234).

The spelling of 21230312021022 in words is "twenty-one trillion, two hundred thirty billion, three hundred twelve million, twenty-one thousand, twenty-two".