330123221 has 4 divisors (see below), whose sum is σ = 349542252. Its totient is φ = 310704192.

The previous prime is 330123217. The next prime is 330123239. The reversal of 330123221 is 122321033.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 186459025 + 143664196 = 13655^2 + 11986^2 .

It is a cyclic number.

It is not a de Polignac number, because 330123221 - 2² = 330123217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 19419013 = 330123221 / (3 + 3 + 0 + 1 + 2 + 3 + 2 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 330123221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (330123421) 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, 9709490 + ... + 9709523.

It is an arithmetic number, because the mean of its divisors is an integer number (87385563).

Almost surely, 2^330123221 is an apocalyptic number.

It is an amenable number.

330123221 is a deficient number, since it is larger than the sum of its proper divisors (19419031).

330123221 is a wasteful number, since it uses less digits than its factorization.

330123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19419030.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 330123221 is about 18169.2933544483. The cubic root of 330123221 is about 691.1283233344.

Adding to 330123221 its reverse (122321033), we get a palindrome (452444254).

The spelling of 330123221 in words is "three hundred thirty million, one hundred twenty-three thousand, two hundred twenty-one".