12221220112 has 40 divisors (see below), whose sum is σ = 23825278904. Its totient is φ = 6072827904.

The previous prime is 12221220101. The next prime is 12221220113. The reversal of 12221220112 is 21102212221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2132222976 + 10088997136 = 46176^2 + 100444^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (12221220113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5782768 + ... + 5784880.

Almost surely, 2^12221220112 is an apocalyptic number.

It is an amenable number.

12221220112 is a deficient number, since it is larger than the sum of its proper divisors (11604058792).

12221220112 is a wasteful number, since it uses less digits than its factorization.

12221220112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4187 (or 4181 counting only the distinct ones).

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

Adding to 12221220112 its reverse (21102212221), we get a palindrome (33323432333).

The spelling of 12221220112 in words is "twelve billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twelve".