12786222426917 has 2 divisors, whose sum is σ = 12786222426918. Its totient is φ = 12786222426916.

The previous prime is 12786222426911. The next prime is 12786222426931. The reversal of 12786222426917 is 71962422268721.

12786222426917 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7313097867076 + 5473124559841 = 2704274^2 + 2339471^2 .

It is a cyclic number.

It is not a de Polignac number, because 12786222426917 - 2¹⁸ = 12786222164773 is a prime.

It is a super-2 number, since 2×12786222426917² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12786222426911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6393111213458 + 6393111213459.

It is an arithmetic number, because the mean of its divisors is an integer number (6393111213459).

Almost surely, 2^{12786222426917} is an apocalyptic number.

It is an amenable number.

12786222426917 is a deficient number, since it is larger than the sum of its proper divisors (1).

12786222426917 is an equidigital number, since it uses as much as digits as its factorization.

12786222426917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 59.

The spelling of 12786222426917 in words is "twelve trillion, seven hundred eighty-six billion, two hundred twenty-two million, four hundred twenty-six thousand, nine hundred seventeen".