321021320000 has 70 divisors (see below), whose sum is σ = 796028640858. Its totient is φ = 128408512000.

The previous prime is 321021319987. The next prime is 321021320029. The reversal of 321021320000 is 23120123.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 129905459776 + 191115860224 = 360424^2 + 437168^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3972767 + ... + 4052766.

Almost surely, 2^321021320000 is an apocalyptic number.

It is an amenable number.

321021320000 is an abundant number, since it is smaller than the sum of its proper divisors (475007320858).

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

321021320000 is an frugal number, since it uses more digits than its factorization.

321021320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8025565 (or 8025540 counting only the distinct ones).

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

Adding to 321021320000 its reverse (23120123), we get a palindrome (321044440123).

The spelling of 321021320000 in words is "three hundred twenty-one billion, twenty-one million, three hundred twenty thousand".