42204242421 has 24 divisors (see below), whose sum is σ = 66539491200. Its totient is φ = 25564545600.

The previous prime is 42204242417. The next prime is 42204242453. The reversal of 42204242421 is 12424240224.

It is not a de Polignac number, because 42204242421 - 2² = 42204242417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42204246421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71305 + ... + 299153.

It is an arithmetic number, because the mean of its divisors is an integer number (2772478800).

Almost surely, 2^42204242421 is an apocalyptic number.

It is an amenable number.

42204242421 is a deficient number, since it is larger than the sum of its proper divisors (24335248779).

42204242421 is a wasteful number, since it uses less digits than its factorization.

42204242421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229737 (or 229734 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 27.

Adding to 42204242421 its reverse (12424240224), we get a palindrome (54628482645).

The spelling of 42204242421 in words is "forty-two billion, two hundred four million, two hundred forty-two thousand, four hundred twenty-one".