320033321021 has 4 divisors (see below), whose sum is σ = 320039533500. Its totient is φ = 320027108544.

The previous prime is 320033320987. The next prime is 320033321051. The reversal of 320033321021 is 120123330023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120123330023 = 169843 ⋅707261.

It can be written as a sum of positive squares in 2 ways, for example, as 187237944100 + 132795376921 = 432710^2 + 364411^2 .

It is a cyclic number.

It is not a de Polignac number, because 320033321021 - 2²⁶ = 319966212157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320033320984 and 320033321002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320033321051) 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, 3028316 + ... + 3132213.

It is an arithmetic number, because the mean of its divisors is an integer number (80009883375).

Almost surely, 2^320033321021 is an apocalyptic number.

It is an amenable number.

320033321021 is a deficient number, since it is larger than the sum of its proper divisors (6212479).

320033321021 is an equidigital number, since it uses as much as digits as its factorization.

320033321021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6212478.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 320033321021 its reverse (120123330023), we get a palindrome (440156651044).

The spelling of 320033321021 in words is "three hundred twenty billion, thirty-three million, three hundred twenty-one thousand, twenty-one".