12112122017 has 2 divisors, whose sum is σ = 12112122018. Its totient is φ = 12112122016.

The previous prime is 12112121947. The next prime is 12112122019. The reversal of 12112122017 is 71022121121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9183580561 + 2928541456 = 95831^2 + 54116^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112122017 - 2¹⁴ = 12112105633 is a prime.

It is a super-2 number, since 2×12112122017² (a number of 21 digits) contains 22 as substring.

Together with 12112122019, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12112122017.

It is not a weakly prime, because it can be changed into another prime (12112122019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056061008 + 6056061009.

It is an arithmetic number, because the mean of its divisors is an integer number (6056061009).

Almost surely, 2^12112122017 is an apocalyptic number.

It is an amenable number.

12112122017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112122017 is an equidigital number, since it uses as much as digits as its factorization.

12112122017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 12112122017 its reverse (71022121121), we get a palindrome (83134243138).

The spelling of 12112122017 in words is "twelve billion, one hundred twelve million, one hundred twenty-two thousand, seventeen".