12220212112 has 10 divisors (see below), whose sum is σ = 23676660998. Its totient is φ = 6110106048.

The previous prime is 12220212089. The next prime is 12220212127. The reversal of 12220212112 is 21121202221.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12072735376 + 147476736 = 109876^2 + 12144^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 763763257 = 12220212112 / (1 + 2 + 2 + 2 + 0 + 2 + 1 + 2 + 1 + 1 + 2).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 381881613 + ... + 381881644.

Almost surely, 2^12220212112 is an apocalyptic number.

It is an amenable number.

12220212112 is a deficient number, since it is larger than the sum of its proper divisors (11456448886).

12220212112 is an equidigital number, since it uses as much as digits as its factorization.

12220212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763763265 (or 763763259 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12220212112 its reverse (21121202221), we get a palindrome (33341414333).

The spelling of 12220212112 in words is "twelve billion, two hundred twenty million, two hundred twelve thousand, one hundred twelve".