11111113888817 has 2 divisors, whose sum is σ = 11111113888818. Its totient is φ = 11111113888816.

The previous prime is 11111113888753. The next prime is 11111113888909. The reversal of 11111113888817 is 71888831111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7384268194801 + 3726845694016 = 2717401^2 + 1930504^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111113888817 - 2⁶ = 11111113888753 is a prime.

It is not a weakly prime, because it can be changed into another prime (11111113288817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555556944408 + 5555556944409.

It is an arithmetic number, because the mean of its divisors is an integer number (5555556944409).

Almost surely, 2^{11111113888817} is an apocalyptic number.

It is an amenable number.

11111113888817 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111113888817 is an equidigital number, since it uses as much as digits as its factorization.

11111113888817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 50.

Adding to 11111113888817 its reverse (71888831111111), we get a palindrome (82999944999928).

The spelling of 11111113888817 in words is "eleven trillion, one hundred eleven billion, one hundred thirteen million, eight hundred eighty-eight thousand, eight hundred seventeen".