320321211020 has 24 divisors (see below), whose sum is σ = 677971198464. Its totient is φ = 127119597696.

The previous prime is 320321210929. The next prime is 320321211037. The reversal of 320321211020 is 20112123023.

It is a self number, because there is not a number n which added to its sum of digits gives 320321211020.

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, 63052817 + ... + 63057896.

It is an arithmetic number, because the mean of its divisors is an integer number (28248799936).

Almost surely, 2^320321211020 is an apocalyptic number.

It is an amenable number.

320321211020 is an abundant number, since it is smaller than the sum of its proper divisors (357649987444).

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

320321211020 is a wasteful number, since it uses less digits than its factorization.

320321211020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126110849 (or 126110847 counting only the distinct ones).

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

Adding to 320321211020 its reverse (20112123023), we get a palindrome (340433334043).

The spelling of 320321211020 in words is "three hundred twenty billion, three hundred twenty-one million, two hundred eleven thousand, twenty".