12220222112 has 36 divisors (see below), whose sum is σ = 27986494410. Its totient is φ = 5237237376.

The previous prime is 12220222093. The next prime is 12220222117. The reversal of 12220222112 is 21122202221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 6534458896 + 5685763216 = 80836^2 + 75404^2 .

It is a super-2 number, since 2×12220222112² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12220222117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3895187 + ... + 3898322.

Almost surely, 2^12220222112 is an apocalyptic number.

It is an amenable number.

12220222112 is an abundant number, since it is smaller than the sum of its proper divisors (15766272298).

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

12220222112 is an equidigital number, since it uses as much as digits as its factorization.

12220222112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7793533 (or 7793518 counting only the distinct ones).

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

Adding to 12220222112 its reverse (21122202221), we get a palindrome (33342424333).

The spelling of 12220222112 in words is "twelve billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twelve".