320111021321 has 64 divisors (see below), whose sum is σ = 406160670720. Its totient is φ = 245590652160.

The previous prime is 320111021317. The next prime is 320111021327. The reversal of 320111021321 is 123120111023.

It is not a de Polignac number, because 320111021321 - 2² = 320111021317 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320111021321.

It is not an unprimeable number, because it can be changed into a prime (320111021327) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 117729800 + ... + 117732518.

It is an arithmetic number, because the mean of its divisors is an integer number (6346260480).

Almost surely, 2^320111021321 is an apocalyptic number.

It is an amenable number.

320111021321 is a deficient number, since it is larger than the sum of its proper divisors (86049649399).

320111021321 is a wasteful number, since it uses less digits than its factorization.

320111021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3094.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 320111021321 its reverse (123120111023), we get a palindrome (443231132344).

The spelling of 320111021321 in words is "three hundred twenty billion, one hundred eleven million, twenty-one thousand, three hundred twenty-one".