320131020002221 has 4 divisors (see below), whose sum is σ = 320134812793632. Its totient is φ = 320127227210812.

The previous prime is 320131020002203. The next prime is 320131020002273. The reversal of 320131020002221 is 122200020131023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320131020002221 - 2¹⁹ = 320131019477933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320131020032221) 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, 1896269095 + ... + 1896437908.

It is an arithmetic number, because the mean of its divisors is an integer number (80033703198408).

Almost surely, 2^{320131020002221} is an apocalyptic number.

It is an amenable number.

320131020002221 is a deficient number, since it is larger than the sum of its proper divisors (3792791411).

320131020002221 is an equidigital number, since it uses as much as digits as its factorization.

320131020002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3792791410.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 320131020002221 its reverse (122200020131023), we get a palindrome (442331040133244).

The spelling of 320131020002221 in words is "three hundred twenty trillion, one hundred thirty-one billion, twenty million, two thousand, two hundred twenty-one".