11111221244317 has 2 divisors, whose sum is σ = 11111221244318. Its totient is φ = 11111221244316.

The previous prime is 11111221244309. The next prime is 11111221244371. The reversal of 11111221244317 is 71344212211111.

It is a happy number.

Together with next prime (11111221244371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9832119055641 + 1279102188676 = 3135621^2 + 1130974^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111221244317 - 2³ = 11111221244309 is a prime.

It is a super-2 number, since 2×11111221244317² (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 (11111221254317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555610622158 + 5555610622159.

It is an arithmetic number, because the mean of its divisors is an integer number (5555610622159).

Almost surely, 2^{11111221244317} is an apocalyptic number.

It is an amenable number.

11111221244317 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111221244317 is an equidigital number, since it uses as much as digits as its factorization.

11111221244317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 31.

Adding to 11111221244317 its reverse (71344212211111), we get a palindrome (82455433455428).

The spelling of 11111221244317 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, two hundred forty-four thousand, three hundred seventeen".