21122111002112 has 40 divisors (see below), whose sum is σ = 42253877014800. Its totient is φ = 10548315777024.

The previous prime is 21122111002093. The next prime is 21122111002123. The reversal of 21122111002112 is 21120011122112.

It is a super-2 number, since 2×21122111002112² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24457412 + ... + 25306307.

It is an arithmetic number, because the mean of its divisors is an integer number (1056346925370).

Almost surely, 2^{21122111002112} is an apocalyptic number.

It is an amenable number.

21122111002112 is an abundant number, since it is smaller than the sum of its proper divisors (21131766012688).

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

21122111002112 is an frugal number, since it uses more digits than its factorization.

21122111002112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49764566 (or 49764550 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21122111002112 its reverse (21120011122112), we get a palindrome (42242122124224).

The spelling of 21122111002112 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred eleven million, two thousand, one hundred twelve".