42402004221 has 16 divisors (see below), whose sum is σ = 56648683584. Its totient is φ = 28211723904.

The previous prime is 42402004219. The next prime is 42402004237. The reversal of 42402004221 is 12240020424.

It is not a de Polignac number, because 42402004221 - 2¹ = 42402004219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42402004201) 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, 3274666 + ... + 3287588.

It is an arithmetic number, because the mean of its divisors is an integer number (3540542724).

Almost surely, 2^42402004221 is an apocalyptic number.

It is an amenable number.

42402004221 is a deficient number, since it is larger than the sum of its proper divisors (14246679363).

42402004221 is a wasteful number, since it uses less digits than its factorization.

42402004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15020.

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

Adding to 42402004221 its reverse (12240020424), we get a palindrome (54642024645).

The spelling of 42402004221 in words is "forty-two billion, four hundred two million, four thousand, two hundred twenty-one".