12222221112 has 64 divisors (see below), whose sum is σ = 33982221600. Its totient is φ = 4070280960.

The previous prime is 12222221101. The next prime is 12222221119. The reversal of 12222221112 is 21112222221.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222221119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211162 + ... + 262742.

Almost surely, 2^12222221112 is an apocalyptic number.

12222221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12222221112 is an abundant number, since it is smaller than the sum of its proper divisors (21760000488).

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

12222221112 is a wasteful number, since it uses less digits than its factorization.

12222221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52693 (or 52683 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 12222221112 its reverse (21112222221), we get a palindrome (33334443333).

The spelling of 12222221112 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred twelve".