321323200320000 has 400 divisors, whose sum is σ = 1074360816239040. Its totient is φ = 85311952896000.

The previous prime is 321323200319999. The next prime is 321323200320119. The reversal of 321323200320000 is 23002323123.

It is a tau number, because it is divible by the number of its divisors (400).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 219109189 + ... + 220570811.

Almost surely, 2^{321323200320000} is an apocalyptic number.

321323200320000 is a gapful number since it is divisible by the number (30) 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 321323200320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (537180408119520).

321323200320000 is an abundant number, since it is smaller than the sum of its proper divisors (753037615919040).

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

321323200320000 is an equidigital number, since it uses as much as digits as its factorization.

321323200320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461893 (or 1461862 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 21.

Adding to 321323200320000 its reverse (23002323123), we get a palindrome (321346202643123).

The spelling of 321323200320000 in words is "three hundred twenty-one trillion, three hundred twenty-three billion, two hundred million, three hundred twenty thousand".