22221110112222 has 32 divisors (see below), whose sum is σ = 50906806156800. Its totient is φ = 6334426437408.

The previous prime is 22221110112217. The next prime is 22221110112239. The reversal of 22221110112222 is 22221101112222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 602571597 + ... + 602608472.

It is an arithmetic number, because the mean of its divisors is an integer number (1590837692400).

Almost surely, 2^{22221110112222} is an apocalyptic number.

22221110112222 is an abundant number, since it is smaller than the sum of its proper divisors (28685696044578).

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

22221110112222 is a wasteful number, since it uses less digits than its factorization.

22221110112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1205180520.

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

Adding to 22221110112222 its reverse (22221101112222), we get a palindrome (44442211224444).

Subtracting from 22221110112222 its reverse (22221101112222), we obtain a square (9000000 = 3000²).

The spelling of 22221110112222 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred ten million, one hundred twelve thousand, two hundred twenty-two".