21122022012020 has 48 divisors (see below), whose sum is σ = 47964701836800. Its totient is φ = 7782632385024.

The previous prime is 21122022012011. The next prime is 21122022012043. The reversal of 21122022012020 is 2021022022112.

It is a happy number.

It is a super-2 number, since 2×21122022012020² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 21122022012020.

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, 660873320 + ... + 660905279.

It is an arithmetic number, because the mean of its divisors is an integer number (999264621600).

Almost surely, 2^{21122022012020} is an apocalyptic number.

21122022012020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122022012020 is an abundant number, since it is smaller than the sum of its proper divisors (26842679824780).

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

21122022012020 is a wasteful number, since it uses less digits than its factorization.

21122022012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321778672 (or 1321778670 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21122022012020 its reverse (2021022022112), we get a palindrome (23143044034132).

The spelling of 21122022012020 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-two million, twelve thousand, twenty".