320333322220021 has 4 divisors (see below), whose sum is σ = 349454533330944. Its totient is φ = 291212111109100.

The previous prime is 320333322219979. The next prime is 320333322220057. The reversal of 320333322220021 is 120022223333023.

It is a happy number.

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 320333322220021 - 2⁹ = 320333322219509 is a prime.

It is a super-2 number, since 2×320333322220021² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320333322221021) 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, 14560605555445 + ... + 14560605555466.

It is an arithmetic number, because the mean of its divisors is an integer number (87363633332736).

Almost surely, 2^{320333322220021} is an apocalyptic number.

It is an amenable number.

320333322220021 is a deficient number, since it is larger than the sum of its proper divisors (29121211110923).

320333322220021 is a wasteful number, since it uses less digits than its factorization.

320333322220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29121211110922.

The product of its (nonzero) digits is 15552, while the sum is 28.

Adding to 320333322220021 its reverse (120022223333023), we get a palindrome (440355545553044).

The spelling of 320333322220021 in words is "three hundred twenty trillion, three hundred thirty-three billion, three hundred twenty-two million, two hundred twenty thousand, twenty-one".