11217612169 has 2 divisors, whose sum is σ = 11217612170. Its totient is φ = 11217612168.

The previous prime is 11217612151. The next prime is 11217612191. The reversal of 11217612169 is 96121671211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10974657600 + 242954569 = 104760^2 + 15587^2 .

It is a cyclic number.

It is not a de Polignac number, because 11217612169 - 2²³ = 11209223561 is a prime.

It is a super-2 number, since 2×11217612169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11217610169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5608806084 + 5608806085.

It is an arithmetic number, because the mean of its divisors is an integer number (5608806085).

Almost surely, 2^11217612169 is an apocalyptic number.

It is an amenable number.

11217612169 is a deficient number, since it is larger than the sum of its proper divisors (1).

11217612169 is an equidigital number, since it uses as much as digits as its factorization.

11217612169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 37.

The spelling of 11217612169 in words is "eleven billion, two hundred seventeen million, six hundred twelve thousand, one hundred sixty-nine".