12222112220 has 12 divisors (see below), whose sum is σ = 25666435704. Its totient is φ = 4888844880.

The previous prime is 12222112219. The next prime is 12222112237. The reversal of 12222112220 is 2221122221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 305552786 + ... + 305552825.

It is an arithmetic number, because the mean of its divisors is an integer number (2138869642).

Almost surely, 2^12222112220 is an apocalyptic number.

12222112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222112220 is an abundant number, since it is smaller than the sum of its proper divisors (13444323484).

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

12222112220 is a wasteful number, since it uses less digits than its factorization.

12222112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611105620 (or 611105618 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 12222112220 its reverse (2221122221), we get a palindrome (14443234441).

The spelling of 12222112220 in words is "twelve billion, two hundred twenty-two million, one hundred twelve thousand, two hundred twenty".