12213123220217 has 2 divisors, whose sum is σ = 12213123220218. Its totient is φ = 12213123220216.

The previous prime is 12213123220187. The next prime is 12213123220229. The reversal of 12213123220217 is 71202232131221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6741168333376 + 5471954886841 = 2596376^2 + 2339221^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213123220217 - 2⁶ = 12213123220153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12213123220217.

It is not a weakly prime, because it can be changed into another prime (12213123220247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106561610108 + 6106561610109.

It is an arithmetic number, because the mean of its divisors is an integer number (6106561610109).

Almost surely, 2^{12213123220217} is an apocalyptic number.

It is an amenable number.

12213123220217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213123220217 is an equidigital number, since it uses as much as digits as its factorization.

12213123220217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

Adding to 12213123220217 its reverse (71202232131221), we get a palindrome (83415355351438).

The spelling of 12213123220217 in words is "twelve trillion, two hundred thirteen billion, one hundred twenty-three million, two hundred twenty thousand, two hundred seventeen".