442112221 has 16 divisors (see below), whose sum is σ = 469175040. Its totient is φ = 415920960.

The previous prime is 442112191. The next prime is 442112239. The reversal of 442112221 is 122211244.

It is a cyclic number.

It is not a de Polignac number, because 442112221 - 2¹¹ = 442110173 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 (442112261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 376966 + ... + 378136.

It is an arithmetic number, because the mean of its divisors is an integer number (29323440).

Almost surely, 2^442112221 is an apocalyptic number.

It is an amenable number.

442112221 is a deficient number, since it is larger than the sum of its proper divisors (27062819).

442112221 is a wasteful number, since it uses less digits than its factorization.

442112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524.

The product of its digits is 256, while the sum is 19.

The square root of 442112221 is about 21026.4647765619. The cubic root of 442112221 is about 761.8056219392.

Adding to 442112221 its reverse (122211244), we get a palindrome (564323465).

The spelling of 442112221 in words is "four hundred forty-two million, one hundred twelve thousand, two hundred twenty-one".