12311323217 has 2 divisors, whose sum is σ = 12311323218. Its totient is φ = 12311323216.

The previous prime is 12311323207. The next prime is 12311323237. The reversal of 12311323217 is 71232311321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7918152256 + 4393170961 = 88984^2 + 66281^2 .

It is an emirp because it is prime and its reverse (71232311321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12311323217 - 2⁶ = 12311323153 is a prime.

It is not a weakly prime, because it can be changed into another prime (12311323207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155661608 + 6155661609.

It is an arithmetic number, because the mean of its divisors is an integer number (6155661609).

Almost surely, 2^12311323217 is an apocalyptic number.

It is an amenable number.

12311323217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311323217 is an equidigital number, since it uses as much as digits as its factorization.

12311323217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1512, while the sum is 26.

Adding to 12311323217 its reverse (71232311321), we get a palindrome (83543634538).

The spelling of 12311323217 in words is "twelve billion, three hundred eleven million, three hundred twenty-three thousand, two hundred seventeen".