1321333317 has 10 divisors (see below), whose sum is σ = 1973843718. Its totient is φ = 880888824.

The previous prime is 1321333309. The next prime is 1321333327. The reversal of 1321333317 is 7133331231.

1321333317 is a `hidden beast` number, since 1 + 321 + 3 + 3 + 331 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1318125636 + 3207681 = 36306^2 + 1791^2 .

It is not a de Polignac number, because 1321333317 - 2³ = 1321333309 is a prime.

It is a super-2 number, since 2×1321333317² = 3491843469228444978, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321333327) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8156298 + ... + 8156459.

Almost surely, 2^1321333317 is an apocalyptic number.

It is an amenable number.

1321333317 is a deficient number, since it is larger than the sum of its proper divisors (652510401).

1321333317 is an equidigital number, since it uses as much as digits as its factorization.

1321333317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16312769 (or 16312760 counting only the distinct ones).

The product of its digits is 3402, while the sum is 27.

The square root of 1321333317 is about 36350.1487892416. The cubic root of 1321333317 is about 1097.3305289181.

Adding to 1321333317 its reverse (7133331231), we get a palindrome (8454664548).

The spelling of 1321333317 in words is "one billion, three hundred twenty-one million, three hundred thirty-three thousand, three hundred seventeen".