320010321221 has 8 divisors (see below), whose sum is σ = 333940427520. Its totient is φ = 306081599472.

The previous prime is 320010321209. The next prime is 320010321223. The reversal of 320010321221 is 122123010023.

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

It is a cyclic number.

It is not a de Polignac number, because 320010321221 - 2¹⁸ = 320010059077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320010321221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320010321223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140771 + ... + 812303.

It is an arithmetic number, because the mean of its divisors is an integer number (41742553440).

Almost surely, 2^320010321221 is an apocalyptic number.

It is an amenable number.

320010321221 is a deficient number, since it is larger than the sum of its proper divisors (13930106299).

320010321221 is a wasteful number, since it uses less digits than its factorization.

320010321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692275.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 320010321221 its reverse (122123010023), we get a palindrome (442133331244).

The spelling of 320010321221 in words is "three hundred twenty billion, ten million, three hundred twenty-one thousand, two hundred twenty-one".