320203132223021 has 2 divisors, whose sum is σ = 320203132223022. Its totient is φ = 320203132223020.

The previous prime is 320203132223017. The next prime is 320203132223041. The reversal of 320203132223021 is 120322231302023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279344892940996 + 40858239282025 = 16713614^2 + 6392045^2 .

It is a cyclic number.

It is not a de Polignac number, because 320203132223021 - 2² = 320203132223017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320203132223041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160101566111510 + 160101566111511.

It is an arithmetic number, because the mean of its divisors is an integer number (160101566111511).

Almost surely, 2^{320203132223021} is an apocalyptic number.

It is an amenable number.

320203132223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

320203132223021 is an equidigital number, since it uses as much as digits as its factorization.

320203132223021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 320203132223021 its reverse (120322231302023), we get a palindrome (440525363525044).

The spelling of 320203132223021 in words is "three hundred twenty trillion, two hundred three billion, one hundred thirty-two million, two hundred twenty-three thousand, twenty-one".