22220112222 has 144 divisors (see below), whose sum is σ = 62008682112. Its totient is φ = 5685150240.

The previous prime is 22220112221. The next prime is 22220112311. The reversal of 22220112222 is 22221102222.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 22220112195 and 22220112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22220112221) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 632943 + ... + 667125.

It is an arithmetic number, because the mean of its divisors is an integer number (430615848).

Almost surely, 2^22220112222 is an apocalyptic number.

22220112222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22220112222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31004341056).

22220112222 is an abundant number, since it is smaller than the sum of its proper divisors (39788569890).

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

22220112222 is a wasteful number, since it uses less digits than its factorization.

22220112222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34283 (or 34273 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22220112222 its reverse (22221102222), we get a palindrome (44441214444).

The spelling of 22220112222 in words is "twenty-two billion, two hundred twenty million, one hundred twelve thousand, two hundred twenty-two".