321233121221 has 8 divisors (see below), whose sum is σ = 324257567040. Its totient is φ = 318209087968.

The previous prime is 321233121203. The next prime is 321233121329. The reversal of 321233121221 is 122121332123.

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 321233121221 - 2¹⁴ = 321233104837 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 (321233129221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1591865 + ... + 1782273.

It is an arithmetic number, because the mean of its divisors is an integer number (40532195880).

Almost surely, 2^321233121221 is an apocalyptic number.

It is an amenable number.

321233121221 is a deficient number, since it is larger than the sum of its proper divisors (3024445819).

321233121221 is a wasteful number, since it uses less digits than its factorization.

321233121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206283.

The product of its digits is 864, while the sum is 23.

Adding to 321233121221 its reverse (122121332123), we get a palindrome (443354453344).

The spelling of 321233121221 in words is "three hundred twenty-one billion, two hundred thirty-three million, one hundred twenty-one thousand, two hundred twenty-one".