22121112020020 has 48 divisors (see below), whose sum is σ = 50028724725840. Its totient is φ = 8167635357696.

The previous prime is 22121112019997. The next prime is 22121112020087. The reversal of 22121112020020 is 2002021112122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 5216482417444 + 16904629602576 = 2283962^2 + 4111524^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22121112019976 and 22121112020003.

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, 12913774 + ... + 14526106.

It is an arithmetic number, because the mean of its divisors is an integer number (1042265098455).

Almost surely, 2^{22121112020020} is an apocalyptic number.

22121112020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121112020020 is an abundant number, since it is smaller than the sum of its proper divisors (27907612705820).

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

22121112020020 is a wasteful number, since it uses less digits than its factorization.

22121112020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665124 (or 1665122 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 22121112020020 its reverse (2002021112122), we get a palindrome (24123133132142).

The spelling of 22121112020020 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred twelve million, twenty thousand, twenty".