442021103345221 has 4 divisors (see below), whose sum is σ = 444667936299552. Its totient is φ = 439374270390892.

The previous prime is 442021103345219. The next prime is 442021103345251. The reversal of 442021103345221 is 122543301120244.

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 not a de Polignac number, because 442021103345221 - 2¹ = 442021103345219 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 (442021103345251) 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, 1323416476915 + ... + 1323416477248.

It is an arithmetic number, because the mean of its divisors is an integer number (111166984074888).

Almost surely, 2^{442021103345221} is an apocalyptic number.

It is an amenable number.

442021103345221 is a deficient number, since it is larger than the sum of its proper divisors (2646832954331).

442021103345221 is a wasteful number, since it uses less digits than its factorization.

442021103345221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2646832954330.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 442021103345221 its reverse (122543301120244), we get a palindrome (564564404465465).

The spelling of 442021103345221 in words is "four hundred forty-two trillion, twenty-one billion, one hundred three million, three hundred forty-five thousand, two hundred twenty-one".