1131320611 has 2 divisors, whose sum is σ = 1131320612. Its totient is φ = 1131320610.

The previous prime is 1131320609. The next prime is 1131320623. The reversal of 1131320611 is 1160231311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131320611 - 2¹ = 1131320609 is a prime.

Together with 1131320609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1131320681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565660305 + 565660306.

It is an arithmetic number, because the mean of its divisors is an integer number (565660306).

Almost surely, 2^1131320611 is an apocalyptic number.

1131320611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131320611 is an equidigital number, since it uses as much as digits as its factorization.

1131320611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1131320611 is about 33635.1097961639. The cubic root of 1131320611 is about 1041.9860382154.

Adding to 1131320611 its reverse (1160231311), we get a palindrome (2291551922).

The spelling of 1131320611 in words is "one billion, one hundred thirty-one million, three hundred twenty thousand, six hundred eleven".