21122021120120 has 16 divisors (see below), whose sum is σ = 47524547520360. Its totient is φ = 8448808448032.

The previous prime is 21122021120023. The next prime is 21122021120173. The reversal of 21122021120120 is 2102112022112.

It is a super-2 number, since 2×21122021120120² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264025263962 + ... + 264025264041.

Almost surely, 2^{21122021120120} is an apocalyptic number.

21122021120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21122021120120 is an abundant number, since it is smaller than the sum of its proper divisors (26402526400240).

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

21122021120120 is a wasteful number, since it uses less digits than its factorization.

21122021120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528050528014 (or 528050528010 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21122021120120 its reverse (2102112022112), we get a palindrome (23224133142232).

The spelling of 21122021120120 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, one hundred twenty thousand, one hundred twenty".