444231222221 has 4 divisors (see below), whose sum is σ = 444233954112. Its totient is φ = 444228490332.

The previous prime is 444231222181. The next prime is 444231222359. The reversal of 444231222221 is 122222132444.

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 444231222221 - 2²² = 444227027917 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 (444231212221) 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, 1105475 + ... + 1452768.

It is an arithmetic number, because the mean of its divisors is an integer number (111058488528).

Almost surely, 2^444231222221 is an apocalyptic number.

It is an amenable number.

444231222221 is a deficient number, since it is larger than the sum of its proper divisors (2731891).

444231222221 is a wasteful number, since it uses less digits than its factorization.

444231222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2731890.

The product of its digits is 12288, while the sum is 29.

Adding to 444231222221 its reverse (122222132444), we get a palindrome (566453354665).

The spelling of 444231222221 in words is "four hundred forty-four billion, two hundred thirty-one million, two hundred twenty-two thousand, two hundred twenty-one".