330244021 has 2 divisors, whose sum is σ = 330244022. Its totient is φ = 330244020.

The previous prime is 330244009. The next prime is 330244027. The reversal of 330244021 is 120442033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 216501796 + 113742225 = 14714^2 + 10665^2 .

It is an emirp because it is prime and its reverse (120442033) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 330244021 - 2⁹ = 330243509 is a prime.

It is a super-2 number, since 2×330244021² = 218122226812496882, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 330244021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (330244027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165122010 + 165122011.

It is an arithmetic number, because the mean of its divisors is an integer number (165122011).

Almost surely, 2^330244021 is an apocalyptic number.

It is an amenable number.

330244021 is a deficient number, since it is larger than the sum of its proper divisors (1).

330244021 is an equidigital number, since it uses as much as digits as its factorization.

330244021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 330244021 is about 18172.6173403833. The cubic root of 330244021 is about 691.2126131942.

Adding to 330244021 its reverse (120442033), we get a palindrome (450686054).

The spelling of 330244021 in words is "three hundred thirty million, two hundred forty-four thousand, twenty-one".