21021220313022 has 32 divisors (see below), whose sum is σ = 42116707148832. Its totient is φ = 6994696495104.

The previous prime is 21021220312979. The next prime is 21021220313029. The reversal of 21021220313022 is 22031302212012.

It is a self number, because there is not a number n which added to its sum of digits gives 21021220313022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021220313029) 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, 126892998 + ... + 127058550.

It is an arithmetic number, because the mean of its divisors is an integer number (1316147098401).

Almost surely, 2^{21021220313022} is an apocalyptic number.

21021220313022 is an abundant number, since it is smaller than the sum of its proper divisors (21095486835810).

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

21021220313022 is a wasteful number, since it uses less digits than its factorization.

21021220313022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202812.

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

Adding to 21021220313022 its reverse (22031302212012), we get a palindrome (43052522525034).

The spelling of 21021220313022 in words is "twenty-one trillion, twenty-one billion, two hundred twenty million, three hundred thirteen thousand, twenty-two".