12112111201217 has 2 divisors, whose sum is σ = 12112111201218. Its totient is φ = 12112111201216.

The previous prime is 12112111201213. The next prime is 12112111201243. The reversal of 12112111201217 is 71210211121121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7147409759296 + 4964701441921 = 2673464^2 + 2228161^2 .

It is a cyclic number.

It is not a de Polignac number, because 12112111201217 - 2² = 12112111201213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12112111201192 and 12112111201201.

It is not a weakly prime, because it can be changed into another prime (12112111201213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6056055600608 + 6056055600609.

It is an arithmetic number, because the mean of its divisors is an integer number (6056055600609).

Almost surely, 2^{12112111201217} is an apocalyptic number.

It is an amenable number.

12112111201217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12112111201217 is an equidigital number, since it uses as much as digits as its factorization.

12112111201217 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 23.

Adding to 12112111201217 its reverse (71210211121121), we get a palindrome (83322322322338).

The spelling of 12112111201217 in words is "twelve trillion, one hundred twelve billion, one hundred eleven million, two hundred one thousand, two hundred seventeen".