42204112221 has 4 divisors (see below), whose sum is σ = 56272149632. Its totient is φ = 28136074812.

The previous prime is 42204112189. The next prime is 42204112259. The reversal of 42204112221 is 12221140224.

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 42204112221 - 2⁵ = 42204112189 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 (42204182221) 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, 7034018701 + ... + 7034018706.

It is an arithmetic number, because the mean of its divisors is an integer number (14068037408).

Almost surely, 2^42204112221 is an apocalyptic number.

It is an amenable number.

42204112221 is a deficient number, since it is larger than the sum of its proper divisors (14068037411).

42204112221 is a wasteful number, since it uses less digits than its factorization.

42204112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14068037410.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 42204112221 its reverse (12221140224), we get a palindrome (54425252445).

The spelling of 42204112221 in words is "forty-two billion, two hundred four million, one hundred twelve thousand, two hundred twenty-one".