321122220221 has 8 divisors (see below), whose sum is σ = 350579155584. Its totient is φ = 291709285920.

The previous prime is 321122220217. The next prime is 321122220233. The reversal of 321122220221 is 122022221123.

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 321122220221 - 2² = 321122220217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321122220193 and 321122220202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321122220271) 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, 10985000 + ... + 11014193.

It is an arithmetic number, because the mean of its divisors is an integer number (43822394448).

Almost surely, 2^321122220221 is an apocalyptic number.

It is an amenable number.

321122220221 is a deficient number, since it is larger than the sum of its proper divisors (29456935363).

321122220221 is a wasteful number, since it uses less digits than its factorization.

321122220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22000531.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 321122220221 its reverse (122022221123), we get a palindrome (443144441344).

The spelling of 321122220221 in words is "three hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".