21122222120112 has 20 divisors (see below), whose sum is σ = 54565740477080. Its totient is φ = 7040740706688.

The previous prime is 21122222120099. The next prime is 21122222120137. The reversal of 21122222120112 is 21102122222112.

It is a super-2 number, since 2×21122222120112² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220023147037 + ... + 220023147132.

It is an arithmetic number, because the mean of its divisors is an integer number (2728287023854).

Almost surely, 2^{21122222120112} is an apocalyptic number.

It is an amenable number.

21122222120112 is an abundant number, since it is smaller than the sum of its proper divisors (33443518356968).

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

21122222120112 is a wasteful number, since it uses less digits than its factorization.

21122222120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440046294180 (or 440046294174 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21122222120112 its reverse (21102122222112), we get a palindrome (42224344342224).

The spelling of 21122222120112 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twelve".