321222013 has 8 divisors (see below), whose sum is σ = 367249280. Its totient is φ = 275229360.

The previous prime is 321222001. The next prime is 321222023. The reversal of 321222013 is 310222123.

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

It is a de Polignac number, because none of the positive numbers 2^k-321222013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15883 + ... + 29911.

It is an arithmetic number, because the mean of its divisors is an integer number (45906160).

Almost surely, 2^321222013 is an apocalyptic number.

It is an amenable number.

321222013 is a deficient number, since it is larger than the sum of its proper divisors (46027267).

321222013 is a wasteful number, since it uses less digits than its factorization.

321222013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17307.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 321222013 is about 17922.6675748896. The cubic root of 321222013 is about 684.8599447265.

Adding to 321222013 its reverse (310222123), we get a palindrome (631444136).

The spelling of 321222013 in words is "three hundred twenty-one million, two hundred twenty-two thousand, thirteen".