320123142420221 has 16 divisors (see below), whose sum is σ = 365991938534400. Its totient is φ = 274288594785408.

The previous prime is 320123142420203. The next prime is 320123142420377. The reversal of 320123142420221 is 122024241321023.

It is a de Polignac number, because none of the positive numbers 2^k-320123142420221 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 (320123142410221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204742811 + ... + 206300423.

It is an arithmetic number, because the mean of its divisors is an integer number (22874496158400).

Almost surely, 2^{320123142420221} is an apocalyptic number.

It is an amenable number.

320123142420221 is a deficient number, since it is larger than the sum of its proper divisors (45868796114179).

320123142420221 is a wasteful number, since it uses less digits than its factorization.

320123142420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1568588.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 320123142420221 its reverse (122024241321023), we get a palindrome (442147383741244).

The spelling of 320123142420221 in words is "three hundred twenty trillion, one hundred twenty-three billion, one hundred forty-two million, four hundred twenty thousand, two hundred twenty-one".