12102221010221 has 4 divisors (see below), whose sum is σ = 12102230840700. Its totient is φ = 12102211179744.

The previous prime is 12102221010167. The next prime is 12102221010233. The reversal of 12102221010221 is 12201012220121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 185986050121 + 11916234960100 = 431261^2 + 3451990^2 .

It is a cyclic number.

It is not a de Polignac number, because 12102221010221 - 2⁶ = 12102221010157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12102221010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12102221013221) 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 3 ways as a sum of consecutive naturals, for example, 2750936 + ... + 5636673.

It is an arithmetic number, because the mean of its divisors is an integer number (3025557710175).

Almost surely, 2^{12102221010221} is an apocalyptic number.

It is an amenable number.

12102221010221 is a deficient number, since it is larger than the sum of its proper divisors (9830479).

12102221010221 is an equidigital number, since it uses as much as digits as its factorization.

12102221010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9830478.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12102221010221 its reverse (12201012220121), we get a palindrome (24303233230342).

The spelling of 12102221010221 in words is "twelve trillion, one hundred two billion, two hundred twenty-one million, ten thousand, two hundred twenty-one".