42121224042 has 16 divisors (see below), whose sum is σ = 84245570112. Its totient is φ = 14039887680.

The previous prime is 42121224023. The next prime is 42121224043. The reversal of 42121224042 is 24042212124.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (42121224043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68667 + ... + 298257.

It is an arithmetic number, because the mean of its divisors is an integer number (5265348132).

Almost surely, 2^42121224042 is an apocalyptic number.

42121224042 is an abundant number, since it is smaller than the sum of its proper divisors (42124346070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42121224042 is a wasteful number, since it uses less digits than its factorization.

42121224042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260173.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 42121224042 its reverse (24042212124), we get a palindrome (66163436166).

The spelling of 42121224042 in words is "forty-two billion, one hundred twenty-one million, two hundred twenty-four thousand, forty-two".