42244228121 has 4 divisors (see below), whose sum is σ = 42282879012. Its totient is φ = 42205577232.

The previous prime is 42244228073. The next prime is 42244228163. The reversal of 42244228121 is 12182244224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39664705600 + 2579522521 = 199160^2 + 50789^2 .

It is a cyclic number.

It is not a de Polignac number, because 42244228121 - 2³⁰ = 41170486297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42244228021) 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 3 ways as a sum of consecutive naturals, for example, 19323806 + ... + 19325991.

It is an arithmetic number, because the mean of its divisors is an integer number (10570719753).

Almost surely, 2^42244228121 is an apocalyptic number.

It is an amenable number.

42244228121 is a deficient number, since it is larger than the sum of its proper divisors (38650891).

42244228121 is a wasteful number, since it uses less digits than its factorization.

42244228121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38650890.

The product of its digits is 16384, while the sum is 32.

The spelling of 42244228121 in words is "forty-two billion, two hundred forty-four million, two hundred twenty-eight thousand, one hundred twenty-one".