12112220 has 24 divisors (see below), whose sum is σ = 26057808. Its totient is φ = 4726400.

The previous prime is 12112187. The next prime is 12112231. The reversal of 12112220 is 2221121.

It is a happy number.

12112220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6566 + ... + 8205.

It is an arithmetic number, because the mean of its divisors is an integer number (1085742).

Almost surely, 2^12112220 is an apocalyptic number.

12112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12112220 is an abundant number, since it is smaller than the sum of its proper divisors (13945588).

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

12112220 is a wasteful number, since it uses less digits than its factorization.

12112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14821 (or 14819 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 12112220 is about 3480.2614844290. The cubic root of 12112220 is about 229.6543010773.

Adding to 12112220 its reverse (2221121), we get a palindrome (14333341).

The spelling of 12112220 in words is "twelve million, one hundred twelve thousand, two hundred twenty".