12312220122017 has 2 divisors, whose sum is σ = 12312220122018. Its totient is φ = 12312220122016.

The previous prime is 12312220121983. The next prime is 12312220122061. The reversal of 12312220122017 is 71022102221321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6330678695056 + 5981541426961 = 2516084^2 + 2445719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12312220122017 is a prime.

It is not a weakly prime, because it can be changed into another prime (12312220172017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6156110061008 + 6156110061009.

It is an arithmetic number, because the mean of its divisors is an integer number (6156110061009).

Almost surely, 2^{12312220122017} is an apocalyptic number.

It is an amenable number.

12312220122017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12312220122017 is an equidigital number, since it uses as much as digits as its factorization.

12312220122017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

Adding to 12312220122017 its reverse (71022102221321), we get a palindrome (83334322343338).

The spelling of 12312220122017 in words is "twelve trillion, three hundred twelve billion, two hundred twenty million, one hundred twenty-two thousand, seventeen".