442220541021 has 48 divisors (see below), whose sum is σ = 731362020480. Its totient is φ = 252231598080.

The previous prime is 442220540987. The next prime is 442220541031. The reversal of 442220541021 is 120145022244.

It is a happy number.

442220541021 is a `hidden beast` number, since 4 + 4 + 2 + 220 + 5 + 410 + 21 = 666.

It is not a de Polignac number, because 442220541021 - 2⁷ = 442220540893 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442220541031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149246086 + ... + 149249048.

It is an arithmetic number, because the mean of its divisors is an integer number (15236708760).

Almost surely, 2^442220541021 is an apocalyptic number.

It is an amenable number.

442220541021 is a deficient number, since it is larger than the sum of its proper divisors (289141479459).

442220541021 is a wasteful number, since it uses less digits than its factorization.

442220541021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6546 (or 6543 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 442220541021 its reverse (120145022244), we get a palindrome (562365563265).

The spelling of 442220541021 in words is "four hundred forty-two billion, two hundred twenty million, five hundred forty-one thousand, twenty-one".