7444443222221 has 8 divisors (see below), whose sum is σ = 7546469159040. Its totient is φ = 7342418562912.

The previous prime is 7444443222199. The next prime is 7444443222241. The reversal of 7444443222221 is 1222223444447.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7444443222221 - 2³⁰ = 7443369480397 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7444443222241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23152076 + ... + 23471418.

It is an arithmetic number, because the mean of its divisors is an integer number (943308644880).

Almost surely, 2^{7444443222221} is an apocalyptic number.

It is an amenable number.

7444443222221 is a deficient number, since it is larger than the sum of its proper divisors (102025936819).

7444443222221 is a wasteful number, since it uses less digits than its factorization.

7444443222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638755.

The product of its digits is 688128, while the sum is 41.

Adding to 7444443222221 its reverse (1222223444447), we get a palindrome (8666666666668).

The spelling of 7444443222221 in words is "seven trillion, four hundred forty-four billion, four hundred forty-three million, two hundred twenty-two thousand, two hundred twenty-one".