222222112220 has 12 divisors (see below), whose sum is σ = 466666435704. Its totient is φ = 88888844880.

The previous prime is 222222112219. The next prime is 222222112339. The reversal of 222222112220 is 22211222222.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 11111105611 = 222222112220 / (2 + 2 + 2 + 2 + 2 + 2 + 1 + 1 + 2 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 222222112192 and 222222112201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555552786 + ... + 5555552825.

It is an arithmetic number, because the mean of its divisors is an integer number (38888869642).

Almost surely, 2^222222112220 is an apocalyptic number.

222222112220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222222112220 is an abundant number, since it is smaller than the sum of its proper divisors (244444323484).

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

222222112220 is a wasteful number, since it uses less digits than its factorization.

222222112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111105620 (or 11111105618 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222222112220 its reverse (22211222222), we get a palindrome (244433334442).

The spelling of 222222112220 in words is "two hundred twenty-two billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty".