42002024020221 has 4 divisors (see below), whose sum is σ = 56002698693632. Its totient is φ = 28001349346812.

The previous prime is 42002024020217. The next prime is 42002024020237. The reversal of 42002024020221 is 12202042020024.

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 not a de Polignac number, because 42002024020221 - 2² = 42002024020217 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 (42002024024221) 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, 7000337336701 + ... + 7000337336706.

It is an arithmetic number, because the mean of its divisors is an integer number (14000674673408).

Almost surely, 2^{42002024020221} is an apocalyptic number.

It is an amenable number.

42002024020221 is a deficient number, since it is larger than the sum of its proper divisors (14000674673411).

42002024020221 is a wasteful number, since it uses less digits than its factorization.

42002024020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14000674673410.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 42002024020221 its reverse (12202042020024), we get a palindrome (54204066040245).

The spelling of 42002024020221 in words is "forty-two trillion, two billion, twenty-four million, twenty thousand, two hundred twenty-one".