203042423111 has 4 divisors (see below), whose sum is σ = 221500825224. Its totient is φ = 184584021000.

The previous prime is 203042423063. The next prime is 203042423147. The reversal of 203042423111 is 111324240302.

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 203042423111 - 2¹⁴ = 203042406727 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 (203042423191) 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, 9229201040 + ... + 9229201061.

It is an arithmetic number, because the mean of its divisors is an integer number (55375206306).

Almost surely, 2^203042423111 is an apocalyptic number.

203042423111 is a deficient number, since it is larger than the sum of its proper divisors (18458402113).

203042423111 is a wasteful number, since it uses less digits than its factorization.

203042423111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18458402112.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 203042423111 its reverse (111324240302), we get a palindrome (314366663413).

The spelling of 203042423111 in words is "two hundred three billion, forty-two million, four hundred twenty-three thousand, one hundred eleven".