320001022021 has 4 divisors (see below), whose sum is σ = 320389845472. Its totient is φ = 319612198572.

The previous prime is 320001022013. The next prime is 320001022097. The reversal of 320001022021 is 120220100023.

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 320001022021 - 2³ = 320001022013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320001021992 and 320001022010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320001082021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194410491 + ... + 194412136.

It is an arithmetic number, because the mean of its divisors is an integer number (80097461368).

Almost surely, 2^320001022021 is an apocalyptic number.

It is an amenable number.

320001022021 is a deficient number, since it is larger than the sum of its proper divisors (388823451).

320001022021 is an equidigital number, since it uses as much as digits as its factorization.

320001022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388823450.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 320001022021 its reverse (120220100023), we get a palindrome (440221122044).

The spelling of 320001022021 in words is "three hundred twenty billion, one million, twenty-two thousand, twenty-one".