320213033121021 has 4 divisors (see below), whose sum is σ = 426950710828032. Its totient is φ = 213475355414012.

The previous prime is 320213033120993. The next prime is 320213033121109. The reversal of 320213033121021 is 120121330312023.

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 320213033121021 - 2⁵ = 320213033120989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 320213033120982 and 320213033121000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320213033121521) 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, 53368838853501 + ... + 53368838853506.

It is an arithmetic number, because the mean of its divisors is an integer number (106737677707008).

Almost surely, 2^{320213033121021} is an apocalyptic number.

It is an amenable number.

320213033121021 is a deficient number, since it is larger than the sum of its proper divisors (106737677707011).

320213033121021 is a wasteful number, since it uses less digits than its factorization.

320213033121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106737677707010.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 320213033121021 its reverse (120121330312023), we get a palindrome (440334363433044).

The spelling of 320213033121021 in words is "three hundred twenty trillion, two hundred thirteen billion, thirty-three million, one hundred twenty-one thousand, twenty-one".