321420300042320 has 20 divisors (see below), whose sum is σ = 747302197598580. Its totient is φ = 128568120016896.

The previous prime is 321420300042319. The next prime is 321420300042341. The reversal of 321420300042320 is 23240003024123.

It can be written as a sum of positive squares in 2 ways, for example, as 88729316301376 + 232690983740944 = 9419624^2 + 15254212^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×321420300042320² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321420300042320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2008876875185 + ... + 2008876875344.

It is an arithmetic number, because the mean of its divisors is an integer number (37365109879929).

Almost surely, 2^{321420300042320} is an apocalyptic number.

It is an amenable number.

321420300042320 is an abundant number, since it is smaller than the sum of its proper divisors (425881897556260).

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

321420300042320 is a wasteful number, since it uses less digits than its factorization.

321420300042320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017753750542 (or 4017753750536 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 321420300042320 its reverse (23240003024123), we get a palindrome (344660303066443).

The spelling of 321420300042320 in words is "three hundred twenty-one trillion, four hundred twenty billion, three hundred million, forty-two thousand, three hundred twenty".