21222221120112 has 20 divisors (see below), whose sum is σ = 54824071227080. Its totient is φ = 7074073706688.

The previous prime is 21222221120053. The next prime is 21222221120153. The reversal of 21222221120112 is 21102112222212.

It is a congruent number.

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, 221064803287 + ... + 221064803382.

It is an arithmetic number, because the mean of its divisors is an integer number (2741203561354).

Almost surely, 2^{21222221120112} is an apocalyptic number.

It is an amenable number.

21222221120112 is an abundant number, since it is smaller than the sum of its proper divisors (33601850106968).

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

21222221120112 is a wasteful number, since it uses less digits than its factorization.

21222221120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442129606680 (or 442129606674 counting only the distinct ones).

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

Adding to 21222221120112 its reverse (21102112222212), we get a palindrome (42324333342324).

The spelling of 21222221120112 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred twenty thousand, one hundred twelve".