44520181221 has 4 divisors (see below), whose sum is σ = 59360241632. Its totient is φ = 29680120812.

The previous prime is 44520181201. The next prime is 44520181259. The reversal of 44520181221 is 12218102544.

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 not a de Polignac number, because 44520181221 - 2⁷ = 44520181093 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 (44520181201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7420030201 + ... + 7420030206.

It is an arithmetic number, because the mean of its divisors is an integer number (14840060408).

Almost surely, 2^44520181221 is an apocalyptic number.

It is an amenable number.

44520181221 is a deficient number, since it is larger than the sum of its proper divisors (14840060411).

44520181221 is a wasteful number, since it uses less digits than its factorization.

44520181221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14840060410.

The product of its (nonzero) digits is 5120, while the sum is 30.

Adding to 44520181221 its reverse (12218102544), we get a palindrome (56738283765).

The spelling of 44520181221 in words is "forty-four billion, five hundred twenty million, one hundred eighty-one thousand, two hundred twenty-one".