11111122117 has 2 divisors, whose sum is σ = 11111122118. Its totient is φ = 11111122116.

The previous prime is 11111122109. The next prime is 11111122129. The reversal of 11111122117 is 71122111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10993312801 + 117809316 = 104849^2 + 10854^2 .

It is an emirp because it is prime and its reverse (71122111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111122117 - 2³ = 11111122109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11111122094 and 11111122103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111125117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555561058 + 5555561059.

It is an arithmetic number, because the mean of its divisors is an integer number (5555561059).

Almost surely, 2^11111122117 is an apocalyptic number.

It is an amenable number.

11111122117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111122117 is an equidigital number, since it uses as much as digits as its factorization.

11111122117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28, while the sum is 19.

Adding to 11111122117 its reverse (71122111111), we get a palindrome (82233233228).

The spelling of 11111122117 in words is "eleven billion, one hundred eleven million, one hundred twenty-two thousand, one hundred seventeen".