1311131303 has 2 divisors, whose sum is σ = 1311131304. Its totient is φ = 1311131302.

The previous prime is 1311131287. The next prime is 1311131387. The reversal of 1311131303 is 3031311131.

It is a weak prime.

It is an emirp because it is prime and its reverse (3031311131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1311131303 - 2⁴ = 1311131287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311131603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655565651 + 655565652.

It is an arithmetic number, because the mean of its divisors is an integer number (655565652).

Almost surely, 2^1311131303 is an apocalyptic number.

1311131303 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311131303 is an equidigital number, since it uses as much as digits as its factorization.

1311131303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 1311131303 is about 36209.5471250332. The cubic root of 1311131303 is about 1094.4990662707.

Adding to 1311131303 its reverse (3031311131), we get a palindrome (4342442434).

The spelling of 1311131303 in words is "one billion, three hundred eleven million, one hundred thirty-one thousand, three hundred three".