42201342221 has 4 divisors (see below), whose sum is σ = 42204772512. Its totient is φ = 42197911932.

The previous prime is 42201342217. The next prime is 42201342223. The reversal of 42201342221 is 12224310224.

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 a cyclic number.

It is not a de Polignac number, because 42201342221 - 2² = 42201342217 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 (42201342223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1696625 + ... + 1721318.

It is an arithmetic number, because the mean of its divisors is an integer number (10551193128).

Almost surely, 2^42201342221 is an apocalyptic number.

It is an amenable number.

42201342221 is a deficient number, since it is larger than the sum of its proper divisors (3430291).

42201342221 is a wasteful number, since it uses less digits than its factorization.

42201342221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3430290.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 42201342221 its reverse (12224310224), we get a palindrome (54425652445).

The spelling of 42201342221 in words is "forty-two billion, two hundred one million, three hundred forty-two thousand, two hundred twenty-one".