1311333321 has 8 divisors (see below), whose sum is σ = 1749885984. Its totient is φ = 873501440.

The previous prime is 1311333311. The next prime is 1311333337. The reversal of 1311333321 is 1233331131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311333321 - 2¹³ = 1311325129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1311333311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175935 + ... + 183236.

It is an arithmetic number, because the mean of its divisors is an integer number (218735748).

Almost surely, 2^1311333321 is an apocalyptic number.

It is an amenable number.

1311333321 is a deficient number, since it is larger than the sum of its proper divisors (438552663).

1311333321 is a wasteful number, since it uses less digits than its factorization.

1311333321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360391.

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

The square root of 1311333321 is about 36212.3365857549. The cubic root of 1311333321 is about 1094.5552765467. Note that the first 3 decimals are identical.

Adding to 1311333321 its reverse (1233331131), we get a palindrome (2544664452).

The spelling of 1311333321 in words is "one billion, three hundred eleven million, three hundred thirty-three thousand, three hundred twenty-one".