442420314240221 has 4 divisors (see below), whose sum is σ = 442420834467744. Its totient is φ = 442419794012700.

The previous prime is 442420314240109. The next prime is 442420314240251. The reversal of 442420314240221 is 122042413024244.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442420314240221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442420314240251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258836015 + ... + 260539676.

It is an arithmetic number, because the mean of its divisors is an integer number (110605208616936).

Almost surely, 2^{442420314240221} is an apocalyptic number.

It is an amenable number.

442420314240221 is a deficient number, since it is larger than the sum of its proper divisors (520227523).

442420314240221 is an equidigital number, since it uses as much as digits as its factorization.

442420314240221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520227522.

The product of its (nonzero) digits is 98304, while the sum is 35.

Adding to 442420314240221 its reverse (122042413024244), we get a palindrome (564462727264465).

The spelling of 442420314240221 in words is "four hundred forty-two trillion, four hundred twenty billion, three hundred fourteen million, two hundred forty thousand, two hundred twenty-one".