1161316111 has 2 divisors, whose sum is σ = 1161316112. Its totient is φ = 1161316110.

The previous prime is 1161316063. The next prime is 1161316147. The reversal of 1161316111 is 1116131611.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1161316111 - 2⁹ = 1161315599 is a prime.

It is a super-3 number, since 3×1161316111³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161316171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580658055 + 580658056.

It is an arithmetic number, because the mean of its divisors is an integer number (580658056).

Almost surely, 2^1161316111 is an apocalyptic number.

1161316111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161316111 is an equidigital number, since it uses as much as digits as its factorization.

1161316111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 22.

The square root of 1161316111 is about 34078.0884293706. The cubic root of 1161316111 is about 1051.1147981477.

Adding to 1161316111 its reverse (1116131611), we get a palindrome (2277447722).

The spelling of 1161316111 in words is "one billion, one hundred sixty-one million, three hundred sixteen thousand, one hundred eleven".