1321321333 has 2 divisors, whose sum is σ = 1321321334. Its totient is φ = 1321321332.

The previous prime is 1321321327. The next prime is 1321321349. The reversal of 1321321333 is 3331231231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1163014609 + 158306724 = 34103^2 + 12582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321321333 - 2²⁵ = 1287766901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321321303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660660666 + 660660667.

It is an arithmetic number, because the mean of its divisors is an integer number (660660667).

Almost surely, 2^1321321333 is an apocalyptic number.

It is an amenable number.

1321321333 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321321333 is an equidigital number, since it uses as much as digits as its factorization.

1321321333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 972, while the sum is 22.

The square root of 1321321333 is about 36349.9839477269. The cubic root of 1321321333 is about 1097.3272114486.

Adding to 1321321333 its reverse (3331231231), we get a palindrome (4652552564).

The spelling of 1321321333 in words is "one billion, three hundred twenty-one million, three hundred twenty-one thousand, three hundred thirty-three".