12217226617 has 16 divisors (see below), whose sum is σ = 12623869440. Its totient is φ = 11816224000.

The previous prime is 12217226587. The next prime is 12217226621. The reversal of 12217226617 is 71662271221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12217226617 is a prime.

It is a super-2 number, since 2×12217226617² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12217296617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2280492 + ... + 2285842.

It is an arithmetic number, because the mean of its divisors is an integer number (788991840).

Almost surely, 2^12217226617 is an apocalyptic number.

It is an amenable number.

12217226617 is a deficient number, since it is larger than the sum of its proper divisors (406642823).

12217226617 is a wasteful number, since it uses less digits than its factorization.

12217226617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5864.

The product of its digits is 28224, while the sum is 37.

Adding to 12217226617 its reverse (71662271221), we get a palindrome (83879497838).

The spelling of 12217226617 in words is "twelve billion, two hundred seventeen million, two hundred twenty-six thousand, six hundred seventeen".