12220221112 has 64 divisors (see below), whose sum is σ = 26486339040. Its totient is φ = 5223936000.

The previous prime is 12220221043. The next prime is 12220221121. The reversal of 12220221112 is 21112202221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2841748 + ... + 2846044.

Almost surely, 2^12220221112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12220221112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13243169520).

12220221112 is an abundant number, since it is smaller than the sum of its proper divisors (14266117928).

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

12220221112 is a wasteful number, since it uses less digits than its factorization.

12220221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6232 (or 6228 counting only the distinct ones).

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

Adding to 12220221112 its reverse (21112202221), we get a palindrome (33332423333).

It can be divided in two parts, 12220 and 221112, that added together give a palindrome (233332).

The spelling of 12220221112 in words is "twelve billion, two hundred twenty million, two hundred twenty-one thousand, one hundred twelve".