1311131333 has 16 divisors (see below), whose sum is σ = 1357171200. Its totient is φ = 1265846400.

The previous prime is 1311131303. The next prime is 1311131387. The reversal of 1311131333 is 3331311131.

It is a cyclic number.

It is not a de Polignac number, because 1311131333 - 2²⁰ = 1310082757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311131303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2188568 + ... + 2189166.

It is an arithmetic number, because the mean of its divisors is an integer number (84823200).

Almost surely, 2^1311131333 is an apocalyptic number.

It is an amenable number.

1311131333 is a deficient number, since it is larger than the sum of its proper divisors (46039867).

1311131333 is a wasteful number, since it uses less digits than its factorization.

1311131333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108.

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

The square root of 1311131333 is about 36209.5475392886. The cubic root of 1311131333 is about 1094.4990746184.

Adding to 1311131333 its reverse (3331311131), we get a palindrome (4642442464).

It can be divided in two parts, 13111 and 31333, that added together give a palindrome (44444).

The spelling of 1311131333 in words is "one billion, three hundred eleven million, one hundred thirty-one thousand, three hundred thirty-three".