1131311171 has 2 divisors, whose sum is σ = 1131311172. Its totient is φ = 1131311170.

The previous prime is 1131311161. The next prime is 1131311213. The reversal of 1131311171 is 1711131311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131311171 - 2¹⁸ = 1131049027 is a prime.

It is not a weakly prime, because it can be changed into another prime (1131311161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565655585 + 565655586.

It is an arithmetic number, because the mean of its divisors is an integer number (565655586).

Almost surely, 2^1131311171 is an apocalyptic number.

1131311171 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131311171 is an equidigital number, since it uses as much as digits as its factorization.

1131311171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63, while the sum is 20.

The square root of 1131311171 is about 33634.9694663159. The cubic root of 1131311171 is about 1041.9831400167.

Adding to 1131311171 its reverse (1711131311), we get a palindrome (2842442482).

The spelling of 1131311171 in words is "one billion, one hundred thirty-one million, three hundred eleven thousand, one hundred seventy-one".