21120102222120 has 192 divisors, whose sum is σ = 78821434411200. Its totient is φ = 4850549775360.

The previous prime is 21120102222113. The next prime is 21120102222203. The reversal of 21120102222120 is 2122220102112.

It is a happy number.

21120102222120 is a `hidden beast` number, since 211 + 20 + 1 + 0 + 222 + 212 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21120102222093 and 21120102222102.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140276317 + ... + 140426796.

It is an arithmetic number, because the mean of its divisors is an integer number (410528304225).

Almost surely, 2^{21120102222120} is an apocalyptic number.

21120102222120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120102222120 is an abundant number, since it is smaller than the sum of its proper divisors (57701332189080).

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

21120102222120 is a wasteful number, since it uses less digits than its factorization.

21120102222120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280703160 (or 280703153 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21120102222120 its reverse (2122220102112), we get a palindrome (23242322324232).

The spelling of 21120102222120 in words is "twenty-one trillion, one hundred twenty billion, one hundred two million, two hundred twenty-two thousand, one hundred twenty".