320040131021 has 16 divisors (see below), whose sum is σ = 350793273600. Its totient is φ = 290201341248.

The previous prime is 320040131011. The next prime is 320040131039. The reversal of 320040131021 is 120131040023.

It is a de Polignac number, because none of the positive numbers 2^k-320040131021 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 (320040131011) 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 15 ways as a sum of consecutive naturals, for example, 588611 + ... + 993248.

It is an arithmetic number, because the mean of its divisors is an integer number (21924579600).

Almost surely, 2^320040131021 is an apocalyptic number.

It is an amenable number.

320040131021 is a deficient number, since it is larger than the sum of its proper divisors (30753142579).

320040131021 is a wasteful number, since it uses less digits than its factorization.

320040131021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582148.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 320040131021 its reverse (120131040023), we get a palindrome (440171171044).

The spelling of 320040131021 in words is "three hundred twenty billion, forty million, one hundred thirty-one thousand, twenty-one".