21100222120112 has 80 divisors (see below), whose sum is σ = 42805844679168. Its totient is φ = 10056723156480.

The previous prime is 21100222120079. The next prime is 21100222120139. The reversal of 21100222120112 is 21102122200112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527868287 + ... + 527908257.

Almost surely, 2^{21100222120112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21100222120112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21402922339584).

21100222120112 is an abundant number, since it is smaller than the sum of its proper divisors (21705622559056).

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

21100222120112 is a wasteful number, since it uses less digits than its factorization.

21100222120112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44898 (or 44892 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21100222120112 its reverse (21102122200112), we get a palindrome (42202344320224).

The spelling of 21100222120112 in words is "twenty-one trillion, one hundred billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twelve".