21120011102120 has 32 divisors (see below), whose sum is σ = 54308599977600. Its totient is φ = 7241146663488.

The previous prime is 21120011102117. The next prime is 21120011102137. The reversal of 21120011102120 is 2120111002112.

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 = 21120011102095 and 21120011102104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37714305260 + ... + 37714305819.

It is an arithmetic number, because the mean of its divisors is an integer number (1697143749300).

Almost surely, 2^{21120011102120} is an apocalyptic number.

21120011102120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120011102120 is an abundant number, since it is smaller than the sum of its proper divisors (33188588875480).

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

21120011102120 is a wasteful number, since it uses less digits than its factorization.

21120011102120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75428611097 (or 75428611093 counting only the distinct ones).

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

Adding to 21120011102120 its reverse (2120111002112), we get a palindrome (23240122104232).

The spelling of 21120011102120 in words is "twenty-one trillion, one hundred twenty billion, eleven million, one hundred two thousand, one hundred twenty".