12217050706561 has 2 divisors, whose sum is σ = 12217050706562. Its totient is φ = 12217050706560.

The previous prime is 12217050706543. The next prime is 12217050706579. The reversal of 12217050706561 is 16560705071221.

It is a balanced prime because it is at equal distance from previous prime (12217050706543) and next prime (12217050706579).

It can be written as a sum of positive squares in only one way, i.e., 8431909250625 + 3785141455936 = 2903775^2 + 1945544^2 .

It is an emirp because it is prime and its reverse (16560705071221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12217050706561 - 2⁵ = 12217050706529 is a prime.

It is not a weakly prime, because it can be changed into another prime (12217050706261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6108525353280 + 6108525353281.

It is an arithmetic number, because the mean of its divisors is an integer number (6108525353281).

Almost surely, 2^{12217050706561} is an apocalyptic number.

It is an amenable number.

12217050706561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12217050706561 is an equidigital number, since it uses as much as digits as its factorization.

12217050706561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 43.

Adding to 12217050706561 its reverse (16560705071221), we get a palindrome (28777755777782).

The spelling of 12217050706561 in words is "twelve trillion, two hundred seventeen billion, fifty million, seven hundred six thousand, five hundred sixty-one".