22120121200020 has 48 divisors (see below), whose sum is σ = 63446981790528. Its totient is φ = 5754828279040.

The previous prime is 22120121199991. The next prime is 22120121200031. The reversal of 22120121200020 is 2000212102122.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 4495957134 + ... + 4495962053.

It is an arithmetic number, because the mean of its divisors is an integer number (1321812120636).

Almost surely, 2^{22120121200020} is an apocalyptic number.

22120121200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22120121200020 is an abundant number, since it is smaller than the sum of its proper divisors (41326860590508).

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

22120121200020 is a wasteful number, since it uses less digits than its factorization.

22120121200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8991919240 (or 8991919238 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22120121200020 its reverse (2000212102122), we get a palindrome (24120333302142).

The spelling of 22120121200020 in words is "twenty-two trillion, one hundred twenty billion, one hundred twenty-one million, two hundred thousand, twenty".