320103323021 has 2 divisors, whose sum is σ = 320103323022. Its totient is φ = 320103323020.

The previous prime is 320103322991. The next prime is 320103323087. The reversal of 320103323021 is 120323301023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 241484770921 + 78618552100 = 491411^2 + 280390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320103323021 is a prime.

It is a super-2 number, since 2×320103323021² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320103322984 and 320103323002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320103323321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160051661510 + 160051661511.

It is an arithmetic number, because the mean of its divisors is an integer number (160051661511).

Almost surely, 2^320103323021 is an apocalyptic number.

It is an amenable number.

320103323021 is a deficient number, since it is larger than the sum of its proper divisors (1).

320103323021 is an equidigital number, since it uses as much as digits as its factorization.

320103323021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 320103323021 its reverse (120323301023), we get a palindrome (440426624044).

The spelling of 320103323021 in words is "three hundred twenty billion, one hundred three million, three hundred twenty-three thousand, twenty-one".