1311333311 has 2 divisors, whose sum is σ = 1311333312. Its totient is φ = 1311333310.

The previous prime is 1311333277. The next prime is 1311333337. The reversal of 1311333311 is 1133331131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311333311 - 2¹⁰ = 1311332287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311333911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655666655 + 655666656.

It is an arithmetic number, because the mean of its divisors is an integer number (655666656).

Almost surely, 2^1311333311 is an apocalyptic number.

1311333311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311333311 is an equidigital number, since it uses as much as digits as its factorization.

1311333311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 243, while the sum is 20.

The square root of 1311333311 is about 36212.3364476804. The cubic root of 1311333311 is about 1094.5552737644. Note that the first 3 decimals are identical.

Adding to 1311333311 its reverse (1133331131), we get a palindrome (2444664442).

The spelling of 1311333311 in words is "one billion, three hundred eleven million, three hundred thirty-three thousand, three hundred eleven".