320021021313 has 32 divisors (see below), whose sum is σ = 551018188800. Its totient is φ = 179769671568.

The previous prime is 320021021227. The next prime is 320021021323. The reversal of 320021021313 is 313120120023.

320021021313 is a `hidden beast` number, since 320 + 0 + 2 + 10 + 21 + 313 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-320021021313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320021021323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14338281 + ... + 14360582.

It is an arithmetic number, because the mean of its divisors is an integer number (17219318400).

Almost surely, 2^320021021313 is an apocalyptic number.

It is an amenable number.

320021021313 is a deficient number, since it is larger than the sum of its proper divisors (230997167487).

320021021313 is a wasteful number, since it uses less digits than its factorization.

320021021313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28698938 (or 28698932 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 320021021313 its reverse (313120120023), we get a palindrome (633141141336).

The spelling of 320021021313 in words is "three hundred twenty billion, twenty-one million, twenty-one thousand, three hundred thirteen".