444130042221 has 12 divisors (see below), whose sum is σ = 665281215872. Its totient is φ = 296086694652.

The previous prime is 444130042157. The next prime is 444130042303. The reversal of 444130042221 is 122240031444.

It is not a de Polignac number, because 444130042221 - 2⁶ = 444130042157 is a prime.

It is a super-2 number, since 2×444130042221² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444130002221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 913847581 + ... + 913848066.

Almost surely, 2^444130042221 is an apocalyptic number.

It is an amenable number.

444130042221 is a deficient number, since it is larger than the sum of its proper divisors (221151173651).

444130042221 is an equidigital number, since it uses as much as digits as its factorization.

444130042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827695662 (or 1827695650 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 444130042221 its reverse (122240031444), we get a palindrome (566370073665).

The spelling of 444130042221 in words is "four hundred forty-four billion, one hundred thirty million, forty-two thousand, two hundred twenty-one".