320323302221 has 4 divisors (see below), whose sum is σ = 344963556252. Its totient is φ = 295683048192.

The previous prime is 320323302209. The next prime is 320323302269. The reversal of 320323302221 is 122203323023.

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 83018896900 + 237304405321 = 288130^2 + 487139^2 .

It is a cyclic number.

It is not a de Polignac number, because 320323302221 - 2³⁴ = 303143433037 is a prime.

It is a super-2 number, since 2×320323302221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320323302521) 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, 12320126996 + ... + 12320127021.

It is an arithmetic number, because the mean of its divisors is an integer number (86240889063).

Almost surely, 2^320323302221 is an apocalyptic number.

It is an amenable number.

320323302221 is a deficient number, since it is larger than the sum of its proper divisors (24640254031).

320323302221 is a wasteful number, since it uses less digits than its factorization.

320323302221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24640254030.

The product of its (nonzero) digits is 2592, while the sum is 23.

Adding to 320323302221 its reverse (122203323023), we get a palindrome (442526625244).

The spelling of 320323302221 in words is "three hundred twenty billion, three hundred twenty-three million, three hundred two thousand, two hundred twenty-one".