320023330321 has 4 divisors (see below), whose sum is σ = 327828777444. Its totient is φ = 312217883200.

The previous prime is 320023330307. The next prime is 320023330331. The reversal of 320023330321 is 123033320023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123033320023 = 17 ⋅7237254119.

It can be written as a sum of positive squares in 2 ways, for example, as 91830817296 + 228192513025 = 303036^2 + 477695^2 .

It is a cyclic number.

It is not a de Polignac number, because 320023330321 - 2⁹ = 320023329809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320023330292 and 320023330301.

It is not an unprimeable number, because it can be changed into a prime (320023330331) 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, 3902723500 + ... + 3902723581.

It is an arithmetic number, because the mean of its divisors is an integer number (81957194361).

Almost surely, 2^320023330321 is an apocalyptic number.

It is an amenable number.

320023330321 is a deficient number, since it is larger than the sum of its proper divisors (7805447123).

320023330321 is an equidigital number, since it uses as much as digits as its factorization.

320023330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7805447122.

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 320023330321 its reverse (123033320023), we get a palindrome (443056650344).

The spelling of 320023330321 in words is "three hundred twenty billion, twenty-three million, three hundred thirty thousand, three hundred twenty-one".