12444200244221 has 4 divisors (see below), whose sum is σ = 12873310597500. Its totient is φ = 12015089890944.

The previous prime is 12444200244181. The next prime is 12444200244227. The reversal of 12444200244221 is 12244200244421.

12444200244221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4479466425625 + 7964733818596 = 2116475^2 + 2822186^2 .

It is a cyclic number.

It is not a de Polignac number, because 12444200244221 - 2²² = 12444196049917 is a prime.

It is a super-3 number, since 3×12444200244221³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12444200244227) 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, 214555176596 + ... + 214555176653.

It is an arithmetic number, because the mean of its divisors is an integer number (3218327649375).

Almost surely, 2^{12444200244221} is an apocalyptic number.

It is an amenable number.

12444200244221 is a deficient number, since it is larger than the sum of its proper divisors (429110353279).

12444200244221 is an equidigital number, since it uses as much as digits as its factorization.

12444200244221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429110353278.

The product of its (nonzero) digits is 32768, while the sum is 32.

Adding to 12444200244221 its reverse (12244200244421), we get a palindrome (24688400488642).

The spelling of 12444200244221 in words is "twelve trillion, four hundred forty-four billion, two hundred million, two hundred forty-four thousand, two hundred twenty-one".