2120330321 has 4 divisors (see below), whose sum is σ = 2245055652. Its totient is φ = 1995604992.

The previous prime is 2120330309. The next prime is 2120330323. The reversal of 2120330321 is 1230330212.

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 1992640321 + 127690000 = 44639^2 + 11300^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120330321 - 2⁶ = 2120330257 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: 124725313 = 2120330321 / (2 + 1 + 2 + 0 + 3 + 3 + 0 + 3 + 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 2120330321.

It is not an unprimeable number, because it can be changed into a prime (2120330323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62362640 + ... + 62362673.

It is an arithmetic number, because the mean of its divisors is an integer number (561263913).

Almost surely, 2^2120330321 is an apocalyptic number.

It is an amenable number.

2120330321 is a deficient number, since it is larger than the sum of its proper divisors (124725331).

2120330321 is a wasteful number, since it uses less digits than its factorization.

2120330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124725330.

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

The square root of 2120330321 is about 46047.0446500098. The cubic root of 2120330321 is about 1284.6983745012.

Adding to 2120330321 its reverse (1230330212), we get a palindrome (3350660533).

The spelling of 2120330321 in words is "two billion, one hundred twenty million, three hundred thirty thousand, three hundred twenty-one".