1330313021 has 2 divisors, whose sum is σ = 1330313022. Its totient is φ = 1330313020.

The previous prime is 1330313009. The next prime is 1330313093. The reversal of 1330313021 is 1203130331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863536996 + 466776025 = 29386^2 + 21605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330313021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330313221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665156510 + 665156511.

It is an arithmetic number, because the mean of its divisors is an integer number (665156511).

Almost surely, 2^1330313021 is an apocalyptic number.

It is an amenable number.

1330313021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330313021 is an equidigital number, since it uses as much as digits as its factorization.

1330313021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 1330313021 is about 36473.4563895444. The cubic root of 1330313021 is about 1099.8107170177.

Adding to 1330313021 its reverse (1203130331), we get a palindrome (2533443352).

The spelling of 1330313021 in words is "one billion, three hundred thirty million, three hundred thirteen thousand, twenty-one".