330220021 has 4 divisors (see below), whose sum is σ = 330541344. Its totient is φ = 329898700.

The previous prime is 330220001. The next prime is 330220049. The reversal of 330220021 is 120022033.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 120022033 = 149 ⋅805517.

It is a cyclic number.

It is not a de Polignac number, because 330220021 - 2¹³ = 330211829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 330219983 and 330220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (330220001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159115 + ... + 161176.

It is an arithmetic number, because the mean of its divisors is an integer number (82635336).

Almost surely, 2^330220021 is an apocalyptic number.

It is an amenable number.

330220021 is a deficient number, since it is larger than the sum of its proper divisors (321323).

330220021 is a wasteful number, since it uses less digits than its factorization.

330220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321322.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 330220021 is about 18171.9569942260. The cubic root of 330220021 is about 691.1958685008.

Adding to 330220021 its reverse (120022033), we get a palindrome (450242054).

The spelling of 330220021 in words is "three hundred thirty million, two hundred twenty thousand, twenty-one".