321201312221 has 8 divisors (see below), whose sum is σ = 321374092800. Its totient is φ = 321028583040.

The previous prime is 321201312203. The next prime is 321201312247. The reversal of 321201312221 is 122213102123.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321201312221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321201312193 and 321201312202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321201317221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19674500 + ... + 19690818.

It is an arithmetic number, because the mean of its divisors is an integer number (40171761600).

Almost surely, 2^321201312221 is an apocalyptic number.

It is an amenable number.

321201312221 is a deficient number, since it is larger than the sum of its proper divisors (172780579).

321201312221 is a wasteful number, since it uses less digits than its factorization.

321201312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25699.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 321201312221 its reverse (122213102123), we get a palindrome (443414414344).

The spelling of 321201312221 in words is "three hundred twenty-one billion, two hundred one million, three hundred twelve thousand, two hundred twenty-one".