12112172 has 12 divisors (see below), whose sum is σ = 21769440. Its totient is φ = 5892336.

The previous prime is 12112159. The next prime is 12112181. The reversal of 12112172 is 27121121.

It is a self number, because there is not a number n which added to its sum of digits gives 12112172.

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 3 ways as a sum of consecutive naturals, for example, 40772 + ... + 41067.

It is an arithmetic number, because the mean of its divisors is an integer number (1814120).

Almost surely, 2^12112172 is an apocalyptic number.

It is an amenable number.

12112172 is a deficient number, since it is larger than the sum of its proper divisors (9657268).

12112172 is a wasteful number, since it uses less digits than its factorization.

12112172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81880 (or 81878 counting only the distinct ones).

The product of its digits is 56, while the sum is 17.

The square root of 12112172 is about 3480.2545883886. The cubic root of 12112172 is about 229.6539977082.

Adding to 12112172 its reverse (27121121), we get a palindrome (39233293).

The spelling of 12112172 in words is "twelve million, one hundred twelve thousand, one hundred seventy-two".