442040424121 has 4 divisors (see below), whose sum is σ = 442044367744. Its totient is φ = 442036480500.

The previous prime is 442040424107. The next prime is 442040424131. The reversal of 442040424121 is 121424040244.

It is a happy number.

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-442040424121 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 442040424121.

It is not an unprimeable number, because it can be changed into a prime (442040424131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1798605 + ... + 2029546.

It is an arithmetic number, because the mean of its divisors is an integer number (110511091936).

Almost surely, 2^442040424121 is an apocalyptic number.

It is an amenable number.

442040424121 is a deficient number, since it is larger than the sum of its proper divisors (3943623).

442040424121 is a wasteful number, since it uses less digits than its factorization.

442040424121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3943622.

The product of its (nonzero) digits is 8192, while the sum is 28.

Adding to 442040424121 its reverse (121424040244), we get a palindrome (563464464365).

The spelling of 442040424121 in words is "four hundred forty-two billion, forty million, four hundred twenty-four thousand, one hundred twenty-one".