321420021320000 has 70 divisors (see below), whose sum is σ = 797017191465858. Its totient is φ = 128568008512000.

The previous prime is 321420021319981. The next prime is 321420021320113. The reversal of 321420021320000 is 23120024123.

It can be written as a sum of positive squares in 5 ways, for example, as 244355922444544 + 77064098875456 = 15631888^2 + 8778616^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 4017710267 + ... + 4017790266.

Almost surely, 2^{321420021320000} is an apocalyptic number.

It is an amenable number.

321420021320000 is an abundant number, since it is smaller than the sum of its proper divisors (475597170145858).

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

321420021320000 is an frugal number, since it uses more digits than its factorization.

321420021320000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8035500565 (or 8035500540 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 321420021320000 its reverse (23120024123), we get a palindrome (321443141344123).

The spelling of 321420021320000 in words is "three hundred twenty-one trillion, four hundred twenty billion, twenty-one million, three hundred twenty thousand".