12221003003221 has 4 divisors (see below), whose sum is σ = 12519076247244. Its totient is φ = 11922929759200.

The previous prime is 12221003003189. The next prime is 12221003003263. The reversal of 12221003003221 is 12230030012221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4314390106321 + 7906612896900 = 2077111^2 + 2811870^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221003003221 - 2⁵ = 12221003003189 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 (12221003003281) 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, 149036621950 + ... + 149036622031.

It is an arithmetic number, because the mean of its divisors is an integer number (3129769061811).

Almost surely, 2^{12221003003221} is an apocalyptic number.

It is an amenable number.

12221003003221 is a deficient number, since it is larger than the sum of its proper divisors (298073244023).

12221003003221 is an equidigital number, since it uses as much as digits as its factorization.

12221003003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298073244022.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 12221003003221 its reverse (12230030012221), we get a palindrome (24451033015442).

The spelling of 12221003003221 in words is "twelve trillion, two hundred twenty-one billion, three million, three thousand, two hundred twenty-one".