12321100221 has 8 divisors (see below), whose sum is σ = 17292772320. Its totient is φ = 7781747472.

The previous prime is 12321100219. The next prime is 12321100241. The reversal of 12321100221 is 12200112321.

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

It is not a de Polignac number, because 12321100221 - 2¹ = 12321100219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12321100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321100201) 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, 108079770 + ... + 108079883.

It is an arithmetic number, because the mean of its divisors is an integer number (2161596540).

Almost surely, 2^12321100221 is an apocalyptic number.

It is an amenable number.

12321100221 is a deficient number, since it is larger than the sum of its proper divisors (4971672099).

12321100221 is a wasteful number, since it uses less digits than its factorization.

12321100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216159675.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12321100221 its reverse (12200112321), we get a palindrome (24521212542).

The spelling of 12321100221 in words is "twelve billion, three hundred twenty-one million, one hundred thousand, two hundred twenty-one".