444220133321 has 4 divisors (see below), whose sum is σ = 445538294292. Its totient is φ = 442901972352.

The previous prime is 444220133263. The next prime is 444220133369. The reversal of 444220133321 is 123331022444.

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 197771431225 + 246448702096 = 444715^2 + 496436^2 .

It is a cyclic number.

It is not a de Polignac number, because 444220133321 - 2⁶ = 444220133257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444220133381) 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, 659079980 + ... + 659080653.

It is an arithmetic number, because the mean of its divisors is an integer number (111384573573).

Almost surely, 2^444220133321 is an apocalyptic number.

It is an amenable number.

444220133321 is a deficient number, since it is larger than the sum of its proper divisors (1318160971).

444220133321 is a wasteful number, since it uses less digits than its factorization.

444220133321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318160970.

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 444220133321 its reverse (123331022444), we get a palindrome (567551155765).

The spelling of 444220133321 in words is "four hundred forty-four billion, two hundred twenty million, one hundred thirty-three thousand, three hundred twenty-one".