12216304717 has 2 divisors, whose sum is σ = 12216304718. Its totient is φ = 12216304716.

The previous prime is 12216304699. The next prime is 12216304729. The reversal of 12216304717 is 71740361221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10523887396 + 1692417321 = 102586^2 + 41139^2 .

It is a cyclic number.

It is not a de Polignac number, because 12216304717 - 2¹¹ = 12216302669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12216304817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108152358 + 6108152359.

It is an arithmetic number, because the mean of its divisors is an integer number (6108152359).

Almost surely, 2^12216304717 is an apocalyptic number.

It is an amenable number.

12216304717 is a deficient number, since it is larger than the sum of its proper divisors (1).

12216304717 is an equidigital number, since it uses as much as digits as its factorization.

12216304717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 34.

Adding to 12216304717 its reverse (71740361221), we get a palindrome (83956665938).

The spelling of 12216304717 in words is "twelve billion, two hundred sixteen million, three hundred four thousand, seven hundred seventeen".