320203323021 has 16 divisors (see below), whose sum is σ = 430127823744. Its totient is φ = 211874386944.

The previous prime is 320203323019. The next prime is 320203323029. The reversal of 320203323021 is 120323302023.

It is not a de Polignac number, because 320203323021 - 2¹ = 320203323019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320203323029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2448720 + ... + 2576166.

It is an arithmetic number, because the mean of its divisors is an integer number (26882988984).

Almost surely, 2^320203323021 is an apocalyptic number.

It is an amenable number.

320203323021 is a deficient number, since it is larger than the sum of its proper divisors (109924500723).

320203323021 is a wasteful number, since it uses less digits than its factorization.

320203323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133700.

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 320203323021 its reverse (120323302023), we get a palindrome (440526625044).

The spelling of 320203323021 in words is "three hundred twenty billion, two hundred three million, three hundred twenty-three thousand, twenty-one".