320133323021 has 4 divisors (see below), whose sum is σ = 320496698844. Its totient is φ = 319769947200.

The previous prime is 320133323017. The next prime is 320133323063. The reversal of 320133323021 is 120323331023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 73869260521 + 246264062500 = 271789^2 + 496250^2 .

It is a cyclic number.

It is not a de Polignac number, because 320133323021 - 2² = 320133323017 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 (320133323821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 181686590 + ... + 181688351.

It is an arithmetic number, because the mean of its divisors is an integer number (80124174711).

Almost surely, 2^320133323021 is an apocalyptic number.

It is an amenable number.

320133323021 is a deficient number, since it is larger than the sum of its proper divisors (363375823).

320133323021 is an equidigital number, since it uses as much as digits as its factorization.

320133323021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363375822.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 320133323021 its reverse (120323331023), we get a palindrome (440456654044).

The spelling of 320133323021 in words is "three hundred twenty billion, one hundred thirty-three million, three hundred twenty-three thousand, twenty-one".