42228860221 has 4 divisors (see below), whose sum is σ = 42397102944. Its totient is φ = 42060617500.

The previous prime is 42228860173. The next prime is 42228860287. The reversal of 42228860221 is 12206882224.

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 42228860221 - 2²⁷ = 42094642493 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 (42228860321) 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, 84120985 + ... + 84121486.

It is an arithmetic number, because the mean of its divisors is an integer number (10599275736).

Almost surely, 2^42228860221 is an apocalyptic number.

It is an amenable number.

42228860221 is a deficient number, since it is larger than the sum of its proper divisors (168242723).

42228860221 is a wasteful number, since it uses less digits than its factorization.

42228860221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168242722.

The product of its (nonzero) digits is 49152, while the sum is 37.

The spelling of 42228860221 in words is "forty-two billion, two hundred twenty-eight million, eight hundred sixty thousand, two hundred twenty-one".