21120212011122 has 80 divisors (see below), whose sum is σ = 54360169174080. Its totient is φ = 6003715025952.

The previous prime is 21120212011109. The next prime is 21120212011133. The reversal of 21120212011122 is 22111021202112.

21120212011122 is a `hidden beast` number, since 211 + 202 + 120 + 11 + 122 = 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 = 21120212011095 and 21120212011104.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 47046972 + ... + 47493767.

It is an arithmetic number, because the mean of its divisors is an integer number (679502114676).

Almost surely, 2^{21120212011122} is an apocalyptic number.

21120212011122 is an abundant number, since it is smaller than the sum of its proper divisors (33239957162958).

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

21120212011122 is a wasteful number, since it uses less digits than its factorization.

21120212011122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94540957 (or 94540948 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21120212011122 its reverse (22111021202112), we get a palindrome (43231233213234).

The spelling of 21120212011122 in words is "twenty-one trillion, one hundred twenty billion, two hundred twelve million, eleven thousand, one hundred twenty-two".