12112212 has 36 divisors (see below), whose sum is σ = 32877600. Its totient is φ = 3460464.

The previous prime is 12112187. The next prime is 12112231. The reversal of 12112212 is 21221121.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9712 + ... + 10887.

Almost surely, 2^12112212 is an apocalyptic number.

12112212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12112212 is an abundant number, since it is smaller than the sum of its proper divisors (20765388).

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

12112212 is a wasteful number, since it uses less digits than its factorization.

12112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20620 (or 20611 counting only the distinct ones).

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

The square root of 12112212 is about 3480.2603350899. The cubic root of 12112212 is about 229.6542505158.

Adding to 12112212 its reverse (21221121), we get a palindrome (33333333).

The spelling of 12112212 in words is "twelve million, one hundred twelve thousand, two hundred twelve".