1161130111 has 2 divisors, whose sum is σ = 1161130112. Its totient is φ = 1161130110.

The previous prime is 1161130097. The next prime is 1161130151. The reversal of 1161130111 is 1110311611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1161130111 - 2²⁹ = 624259199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1161130151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 580565055 + 580565056.

It is an arithmetic number, because the mean of its divisors is an integer number (580565056).

Almost surely, 2^1161130111 is an apocalyptic number.

1161130111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1161130111 is an equidigital number, since it uses as much as digits as its factorization.

1161130111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 1161130111 is about 34075.3592937771. The cubic root of 1161130111 is about 1051.0586785465.

Adding to 1161130111 its reverse (1110311611), we get a palindrome (2271441722).

The spelling of 1161130111 in words is "one billion, one hundred sixty-one million, one hundred thirty thousand, one hundred eleven".