1311231017 has 2 divisors, whose sum is σ = 1311231018. Its totient is φ = 1311231016.

The previous prime is 1311231011. The next prime is 1311231067. The reversal of 1311231017 is 7101321131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1190319001 + 120912016 = 34501^2 + 10996^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311231017 - 2⁴ = 1311231001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311231017.

It is not a weakly prime, because it can be changed into another prime (1311231011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655615508 + 655615509.

It is an arithmetic number, because the mean of its divisors is an integer number (655615509).

Almost surely, 2^1311231017 is an apocalyptic number.

It is an amenable number.

1311231017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311231017 is an equidigital number, since it uses as much as digits as its factorization.

1311231017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 1311231017 is about 36210.9240009144. The cubic root of 1311231017 is about 1094.5268118044.

Adding to 1311231017 its reverse (7101321131), we get a palindrome (8412552148).

The spelling of 1311231017 in words is "one billion, three hundred eleven million, two hundred thirty-one thousand, seventeen".