12321210564217 has 2 divisors, whose sum is σ = 12321210564218. Its totient is φ = 12321210564216.

The previous prime is 12321210564167. The next prime is 12321210564227. The reversal of 12321210564217 is 71246501212321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12285754050816 + 35456513401 = 3505104^2 + 188299^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321210564217 - 2¹⁵ = 12321210531449 is a prime.

It is not a weakly prime, because it can be changed into another prime (12321210564227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160605282108 + 6160605282109.

It is an arithmetic number, because the mean of its divisors is an integer number (6160605282109).

Almost surely, 2^{12321210564217} is an apocalyptic number.

It is an amenable number.

12321210564217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321210564217 is an equidigital number, since it uses as much as digits as its factorization.

12321210564217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

Adding to 12321210564217 its reverse (71246501212321), we get a palindrome (83567711776538).

The spelling of 12321210564217 in words is "twelve trillion, three hundred twenty-one billion, two hundred ten million, five hundred sixty-four thousand, two hundred seventeen".