12211003020221 has 4 divisors (see below), whose sum is σ = 12211013004252. Its totient is φ = 12210993036192.

The previous prime is 12211003020211. The next prime is 12211003020289. The reversal of 12211003020221 is 12202030011221.

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 5989345814596 + 6221657205625 = 2447314^2 + 2494325^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211003020221 - 2¹⁸ = 12211002758077 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12211003020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211003020211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2851490 + ... + 5705523.

It is an arithmetic number, because the mean of its divisors is an integer number (3052753251063).

Almost surely, 2^{12211003020221} is an apocalyptic number.

It is an amenable number.

12211003020221 is a deficient number, since it is larger than the sum of its proper divisors (9984031).

12211003020221 is an equidigital number, since it uses as much as digits as its factorization.

12211003020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9984030.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 12211003020221 its reverse (12202030011221), we get a palindrome (24413033031442).

The spelling of 12211003020221 in words is "twelve trillion, two hundred eleven billion, three million, twenty thousand, two hundred twenty-one".