21121112000120 has 64 divisors (see below), whose sum is σ = 52129153571040. Its totient is φ = 7637971161600.

The previous prime is 21121111999987. The next prime is 21121112000159. The reversal of 21121112000120 is 2100021112112.

It is a super-2 number, since 2×21121112000120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21121112000095 and 21121112000104.

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, 132524027 + ... + 132683306.

Almost surely, 2^{21121112000120} is an apocalyptic number.

21121112000120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121112000120 is an abundant number, since it is smaller than the sum of its proper divisors (31008041570920).

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

21121112000120 is a wasteful number, since it uses less digits than its factorization.

21121112000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265207536 (or 265207532 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21121112000120 its reverse (2100021112112), we get a palindrome (23221133112232).

The spelling of 21121112000120 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred twelve million, one hundred twenty", and thus it is an aban number.