22122222112 has 96 divisors (see below), whose sum is σ = 46199462400. Its totient is φ = 10406043648.

The previous prime is 22122222071. The next prime is 22122222131. The reversal of 22122222112 is 21122222122.

It is a super-2 number, since 2×22122222112² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 22122222112.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19593964 + ... + 19595092.

It is an arithmetic number, because the mean of its divisors is an integer number (481244400).

Almost surely, 2^22122222112 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 22122222112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23099731200).

22122222112 is an abundant number, since it is smaller than the sum of its proper divisors (24077240288).

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

22122222112 is a wasteful number, since it uses less digits than its factorization.

22122222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578 (or 1570 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

Adding to 22122222112 its reverse (21122222122), we get a palindrome (43244444234).

The spelling of 22122222112 in words is "twenty-two billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twelve".