22121010012020 has 48 divisors (see below), whose sum is σ = 50516087121360. Its totient is φ = 8102831007744.

The previous prime is 22121010011993. The next prime is 22121010012103. The reversal of 22121010012020 is 2021001012122.

It can be written as a sum of positive squares in 8 ways, for example, as 928116438544 + 21192893573476 = 963388^2 + 4603574^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22121010011986 and 22121010012004.

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, 879200855 + ... + 879226014.

It is an arithmetic number, because the mean of its divisors is an integer number (1052418481695).

Almost surely, 2^{22121010012020} is an apocalyptic number.

22121010012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121010012020 is an abundant number, since it is smaller than the sum of its proper divisors (28395077109340).

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

22121010012020 is a wasteful number, since it uses less digits than its factorization.

22121010012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758426932 (or 1758426930 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22121010012020 its reverse (2021001012122), we get a palindrome (24142011024142).

The spelling of 22121010012020 in words is "twenty-two trillion, one hundred twenty-one billion, ten million, twelve thousand, twenty".