442440111421 has 12 divisors (see below), whose sum is σ = 561463889760. Its totient is φ = 344758527960.

The previous prime is 442440111403. The next prime is 442440111437. The reversal of 442440111421 is 124111044244.

It is not a de Polignac number, because 442440111421 - 2¹⁵ = 442440078653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 442440111421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442440111481) 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, 410426281 + ... + 410427358.

It is an arithmetic number, because the mean of its divisors is an integer number (46788657480).

Almost surely, 2^442440111421 is an apocalyptic number.

It is an amenable number.

442440111421 is a deficient number, since it is larger than the sum of its proper divisors (119023778339).

442440111421 is a wasteful number, since it uses less digits than its factorization.

442440111421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820853664 (or 820853657 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 442440111421 its reverse (124111044244), we get a palindrome (566551155665).

The spelling of 442440111421 in words is "four hundred forty-two billion, four hundred forty million, one hundred eleven thousand, four hundred twenty-one".