12221100321 has 8 divisors (see below), whose sum is σ = 16298165184. Its totient is φ = 8145717840.

The previous prime is 12221100313. The next prime is 12221100323. The reversal of 12221100321 is 12300112221.

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

It is not a de Polignac number, because 12221100321 - 2³ = 12221100313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12221100321.

It is not an unprimeable number, because it can be changed into a prime (12221100323) 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, 403546 + ... + 432771.

It is an arithmetic number, because the mean of its divisors is an integer number (2037270648).

Almost surely, 2^12221100321 is an apocalyptic number.

It is an amenable number.

12221100321 is a deficient number, since it is larger than the sum of its proper divisors (4077064863).

12221100321 is an equidigital number, since it uses as much as digits as its factorization.

12221100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841191.

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

Adding to 12221100321 its reverse (12300112221), we get a palindrome (24521212542).

The spelling of 12221100321 in words is "twelve billion, two hundred twenty-one million, one hundred thousand, three hundred twenty-one".