1330016921 has 2 divisors, whose sum is σ = 1330016922. Its totient is φ = 1330016920.

The previous prime is 1330016899. The next prime is 1330016971. The reversal of 1330016921 is 1296100331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1058591296 + 271425625 = 32536^2 + 16475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330016921 is a prime.

It is not a weakly prime, because it can be changed into another prime (1330016971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665008460 + 665008461.

It is an arithmetic number, because the mean of its divisors is an integer number (665008461).

Almost surely, 2^1330016921 is an apocalyptic number.

It is an amenable number.

1330016921 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330016921 is an equidigital number, since it uses as much as digits as its factorization.

1330016921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1330016921 is about 36469.3970473876. The cubic root of 1330016921 is about 1099.7291126353.

The spelling of 1330016921 in words is "one billion, three hundred thirty million, sixteen thousand, nine hundred twenty-one".