320303021312 has 72 divisors (see below), whose sum is σ = 653789179680. Its totient is φ = 156565923840.

The previous prime is 320303021309. The next prime is 320303021351. The reversal of 320303021312 is 213120303023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2675243 + ... + 2792405.

Almost surely, 2^320303021312 is an apocalyptic number.

320303021312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320303021312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (326894589840).

320303021312 is an abundant number, since it is smaller than the sum of its proper divisors (333486158368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320303021312 is a wasteful number, since it uses less digits than its factorization.

320303021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117419 (or 117405 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 320303021312 its reverse (213120303023), we get a palindrome (533423324335).

The spelling of 320303021312 in words is "three hundred twenty billion, three hundred three million, twenty-one thousand, three hundred twelve".