1191171543119 has 2 divisors, whose sum is σ = 1191171543120. Its totient is φ = 1191171543118.

The previous prime is 1191171543041. The next prime is 1191171543131. The reversal of 1191171543119 is 9113451711911.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1191171543119 - 2²⁰ = 1191170494543 is a prime.

It is a super-2 number, since 2×1191171543119² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1191171543119.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1191171543169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595585771559 + 595585771560.

It is an arithmetic number, because the mean of its divisors is an integer number (595585771560).

Almost surely, 2^{1191171543119} is an apocalyptic number.

1191171543119 is a deficient number, since it is larger than the sum of its proper divisors (1).

1191171543119 is an equidigital number, since it uses as much as digits as its factorization.

1191171543119 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 44.

The spelling of 1191171543119 in words is "one trillion, one hundred ninety-one billion, one hundred seventy-one million, five hundred forty-three thousand, one hundred nineteen".