1311213333 has 16 divisors (see below), whose sum is σ = 1812517056. Its totient is φ = 842540160.

The previous prime is 1311213301. The next prime is 1311213347. The reversal of 1311213333 is 3333121131.

It is not a de Polignac number, because 1311213333 - 2⁵ = 1311213301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311213133) 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, 54010 + ... + 74427.

It is an arithmetic number, because the mean of its divisors is an integer number (113282316).

Almost surely, 2^1311213333 is an apocalyptic number.

It is an amenable number.

1311213333 is a deficient number, since it is larger than the sum of its proper divisors (501303723).

1311213333 is a wasteful number, since it uses less digits than its factorization.

1311213333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128564.

The product of its digits is 486, while the sum is 21.

The square root of 1311213333 is about 36210.6798196333. The cubic root of 1311213333 is about 1094.5218913139.

Adding to 1311213333 its reverse (3333121131), we get a palindrome (4644334464).

The spelling of 1311213333 in words is "one billion, three hundred eleven million, two hundred thirteen thousand, three hundred thirty-three".