1115117111 has 2 divisors, whose sum is σ = 1115117112. Its totient is φ = 1115117110.

The previous prime is 1115117099. The next prime is 1115117123. The reversal of 1115117111 is 1117115111.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1115117099) and next prime (1115117123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1115117111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1115117131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557558555 + 557558556.

It is an arithmetic number, because the mean of its divisors is an integer number (557558556).

Almost surely, 2^1115117111 is an apocalyptic number.

1115117111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1115117111 is an equidigital number, since it uses as much as digits as its factorization.

1115117111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35, while the sum is 20.

The square root of 1115117111 is about 33393.3692669668. The cubic root of 1115117111 is about 1036.9874329986.

The spelling of 1115117111 in words is "one billion, one hundred fifteen million, one hundred seventeen thousand, one hundred eleven".