1131111665171 has 2 divisors, whose sum is σ = 1131111665172. Its totient is φ = 1131111665170.

The previous prime is 1131111665111. The next prime is 1131111665207. The reversal of 1131111665171 is 1715661111311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1131111665171 - 2²⁶ = 1131044556307 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131111665111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565555832585 + 565555832586.

It is an arithmetic number, because the mean of its divisors is an integer number (565555832586).

Almost surely, 2^{1131111665171} is an apocalyptic number.

1131111665171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131111665171 is an equidigital number, since it uses as much as digits as its factorization.

1131111665171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 35.

Adding to 1131111665171 its reverse (1715661111311), we get a palindrome (2846772776482).

The spelling of 1131111665171 in words is "one trillion, one hundred thirty-one billion, one hundred eleven million, six hundred sixty-five thousand, one hundred seventy-one".