12112217 has 4 divisors (see below), whose sum is σ = 13043940. Its totient is φ = 11180496.

The previous prime is 12112187. The next prime is 12112231. The reversal of 12112217 is 71221121.

12112217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8128201 + 3984016 = 2851^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112217 - 2¹⁶ = 12046681 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12112195 and 12112204.

It is not an unprimeable number, because it can be changed into a prime (12112297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 465842 + ... + 465867.

It is an arithmetic number, because the mean of its divisors is an integer number (3260985).

Almost surely, 2^12112217 is an apocalyptic number.

It is an amenable number.

12112217 is a deficient number, since it is larger than the sum of its proper divisors (931723).

12112217 is an equidigital number, since it uses as much as digits as its factorization.

12112217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931722.

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

The square root of 12112217 is about 3480.2610534269. The cubic root of 12112217 is about 229.6542821168.

Adding to 12112217 its reverse (71221121), we get a palindrome (83333338).

The spelling of 12112217 in words is "twelve million, one hundred twelve thousand, two hundred seventeen".