1311100331 has 2 divisors, whose sum is σ = 1311100332. Its totient is φ = 1311100330.

The previous prime is 1311100327. The next prime is 1311100361. The reversal of 1311100331 is 1330011131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311100331 - 2² = 1311100327 is a prime.

It is a super-2 number, since 2×1311100331² = 3437968155896619122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311100361) 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, 655550165 + 655550166.

It is an arithmetic number, because the mean of its divisors is an integer number (655550166).

Almost surely, 2^1311100331 is an apocalyptic number.

1311100331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311100331 is an equidigital number, since it uses as much as digits as its factorization.

1311100331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27, while the sum is 14.

The square root of 1311100331 is about 36209.1194452447. The cubic root of 1311100331 is about 1094.4904479902.

Adding to 1311100331 its reverse (1330011131), we get a palindrome (2641111462).

The spelling of 1311100331 in words is "one billion, three hundred eleven million, one hundred thousand, three hundred thirty-one".