12221112 has 32 divisors (see below), whose sum is σ = 30844800. Its totient is φ = 4034784.

The previous prime is 12221107. The next prime is 12221117. The reversal of 12221112 is 21112221.

It is an interprime number because it is at equal distance from previous prime (12221107) and next prime (12221117).

It is a Harshad number since it is a multiple of its sum of digits (12).

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 (12221117) 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, 189 + ... + 4947.

It is an arithmetic number, because the mean of its divisors is an integer number (963900).

Almost surely, 2^12221112 is an apocalyptic number.

12221112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221112 is an abundant number, since it is smaller than the sum of its proper divisors (18623688).

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

12221112 is a wasteful number, since it uses less digits than its factorization.

12221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4875 (or 4871 counting only the distinct ones).

The product of its digits is 16, while the sum is 12.

The square root of 12221112 is about 3495.8707069913. The cubic root of 12221112 is about 230.3404661479.

Adding to 12221112 its reverse (21112221), we get a palindrome (33333333).

The spelling of 12221112 in words is "twelve million, two hundred twenty-one thousand, one hundred twelve".