42423421123 has 4 divisors (see below), whose sum is σ = 42426925200. Its totient is φ = 42419917048.

The previous prime is 42423421111. The next prime is 42423421163. The reversal of 42423421123 is 32112432424.

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

It is a cyclic number.

It is not a de Polignac number, because 42423421123 - 2⁵ = 42423421091 is a prime.

It is a super-2 number, since 2×42423421123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42423421091 and 42423421100.

It is not an unprimeable number, because it can be changed into a prime (42423421163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1733815 + ... + 1758112.

It is an arithmetic number, because the mean of its divisors is an integer number (10606731300).

Almost surely, 2^42423421123 is an apocalyptic number.

42423421123 is a deficient number, since it is larger than the sum of its proper divisors (3504077).

42423421123 is a wasteful number, since it uses less digits than its factorization.

42423421123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504076.

The product of its digits is 9216, while the sum is 28.

Adding to 42423421123 its reverse (32112432424), we get a palindrome (74535853547).

The spelling of 42423421123 in words is "forty-two billion, four hundred twenty-three million, four hundred twenty-one thousand, one hundred twenty-three".