42242144021 has 32 divisors (see below), whose sum is σ = 52863283200. Its totient is φ = 32792662080.

The previous prime is 42242143997. The next prime is 42242144023. The reversal of 42242144021 is 12044124224.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 42242144021 - 2¹⁴ = 42242127637 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 (42242144023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40656020 + ... + 40657058.

It is an arithmetic number, because the mean of its divisors is an integer number (1651977600).

Almost surely, 2^42242144021 is an apocalyptic number.

It is an amenable number.

42242144021 is a deficient number, since it is larger than the sum of its proper divisors (10621139179).

42242144021 is a wasteful number, since it uses less digits than its factorization.

42242144021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2529.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 42242144021 its reverse (12044124224), we get a palindrome (54286268245).

The spelling of 42242144021 in words is "forty-two billion, two hundred forty-two million, one hundred forty-four thousand, twenty-one".