21222222001112 has 48 divisors (see below), whose sum is σ = 44170996388400. Its totient is φ = 9550954952000.

The previous prime is 21222222001109. The next prime is 21222222001153. The reversal of 21222222001112 is 21110022222212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108435812 + ... + 108631347.

It is an arithmetic number, because the mean of its divisors is an integer number (920229091425).

Almost surely, 2^{21222222001112} is an apocalyptic number.

21222222001112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21222222001112 is an abundant number, since it is smaller than the sum of its proper divisors (22948774387288).

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

21222222001112 is a wasteful number, since it uses less digits than its factorization.

21222222001112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217067288 (or 217067273 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222222001112 its reverse (21110022222212), we get a palindrome (42332244223324).

The spelling of 21222222001112 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two million, one thousand, one hundred twelve".