1171171771117 has 2 divisors, whose sum is σ = 1171171771118. Its totient is φ = 1171171771116.

The previous prime is 1171171771103. The next prime is 1171171771201. The reversal of 1171171771117 is 7111771711711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1095495062281 + 75676708836 = 1046659^2 + 275094^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1171171771117 is a prime.

It is a super-2 number, since 2×1171171771117² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1171171771417) 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, 585585885558 + 585585885559.

It is an arithmetic number, because the mean of its divisors is an integer number (585585885559).

Almost surely, 2^{1171171771117} is an apocalyptic number.

It is an amenable number.

1171171771117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1171171771117 is an equidigital number, since it uses as much as digits as its factorization.

1171171771117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16807, while the sum is 43.

The spelling of 1171171771117 in words is "one trillion, one hundred seventy-one billion, one hundred seventy-one million, seven hundred seventy-one thousand, one hundred seventeen".