42442142102021 has 16 divisors (see below), whose sum is σ = 45454071628800. Its totient is φ = 39557327015808.

The previous prime is 42442142101981. The next prime is 42442142102047. The reversal of 42442142102021 is 12020124124424.

It is a cyclic number.

It is not a de Polignac number, because 42442142102021 - 2²² = 42442137907717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42442142902021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 213179741 + ... + 213378738.

It is an arithmetic number, because the mean of its divisors is an integer number (2840879476800).

Almost surely, 2^{42442142102021} is an apocalyptic number.

It is an amenable number.

42442142102021 is a deficient number, since it is larger than the sum of its proper divisors (3011929526779).

42442142102021 is a wasteful number, since it uses less digits than its factorization.

42442142102021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426558628.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 42442142102021 its reverse (12020124124424), we get a palindrome (54462266226445).

The spelling of 42442142102021 in words is "forty-two trillion, four hundred forty-two billion, one hundred forty-two million, one hundred two thousand, twenty-one".