320121320000 has 70 divisors (see below), whose sum is σ = 793796933358. Its totient is φ = 128048512000.

The previous prime is 320121319997. The next prime is 320121320017. The reversal of 320121320000 is 23121023.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 92080688704 + 228040631296 = 303448^2 + 477536^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3961517 + ... + 4041516.

Almost surely, 2^320121320000 is an apocalyptic number.

It is an amenable number.

320121320000 is an abundant number, since it is smaller than the sum of its proper divisors (473675613358).

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

320121320000 is an frugal number, since it uses more digits than its factorization.

320121320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8003065 (or 8003040 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 320121320000 its reverse (23121023), we get a palindrome (320144441023).

The spelling of 320121320000 in words is "three hundred twenty billion, one hundred twenty-one million, three hundred twenty thousand".