22121020200020 has 48 divisors (see below), whose sum is σ = 53104648840320. Its totient is φ = 7582321160064.

The previous prime is 22121020199989. The next prime is 22121020200023. The reversal of 22121020200020 is 2000202012122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 22121020199968 and 22121020200004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121020200023) 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, 20606159 + ... + 21653078.

It is an arithmetic number, because the mean of its divisors is an integer number (1106346850840).

Almost surely, 2^{22121020200020} is an apocalyptic number.

22121020200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22121020200020 is an abundant number, since it is smaller than the sum of its proper divisors (30983628640300).

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

22121020200020 is a wasteful number, since it uses less digits than its factorization.

22121020200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42262992 (or 42262990 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 22121020200020 its reverse (2000202012122), we get a palindrome (24121222212142).

The spelling of 22121020200020 in words is "twenty-two trillion, one hundred twenty-one billion, twenty million, two hundred thousand, twenty".