320201330021 has 2 divisors, whose sum is σ = 320201330022. Its totient is φ = 320201330020.

The previous prime is 320201329999. The next prime is 320201330027. The reversal of 320201330021 is 120033102023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202630521025 + 117570808996 = 450145^2 + 342886^2 .

It is a cyclic number.

It is not a de Polignac number, because 320201330021 - 2⁶ = 320201329957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320201330027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160100665010 + 160100665011.

It is an arithmetic number, because the mean of its divisors is an integer number (160100665011).

Almost surely, 2^320201330021 is an apocalyptic number.

It is an amenable number.

320201330021 is a deficient number, since it is larger than the sum of its proper divisors (1).

320201330021 is an equidigital number, since it uses as much as digits as its factorization.

320201330021 is an evil number, because the sum of its binary digits is even.

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

Adding to 320201330021 its reverse (120033102023), we get a palindrome (440234432044).

The spelling of 320201330021 in words is "three hundred twenty billion, two hundred one million, three hundred thirty thousand, twenty-one".