444221234213213 has 4 divisors (see below), whose sum is σ = 444487713659520. Its totient is φ = 443954754766908.

The previous prime is 444221234213177. The next prime is 444221234213227. The reversal of 444221234213213 is 312312432122444.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 444221234213213 - 2²⁴ = 444221217435997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444221234216213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133239720653 + ... + 133239723986.

It is an arithmetic number, because the mean of its divisors is an integer number (111121928414880).

Almost surely, 2^{444221234213213} is an apocalyptic number.

It is an amenable number.

444221234213213 is a deficient number, since it is larger than the sum of its proper divisors (266479446307).

444221234213213 is a wasteful number, since it uses less digits than its factorization.

444221234213213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266479446306.

The product of its digits is 221184, while the sum is 38.

Adding to 444221234213213 its reverse (312312432122444), we get a palindrome (756533666335657).

The spelling of 444221234213213 in words is "four hundred forty-four trillion, two hundred twenty-one billion, two hundred thirty-four million, two hundred thirteen thousand, two hundred thirteen".