203042423121 has 16 divisors (see below), whose sum is σ = 274538212608. Its totient is φ = 133465248000.

The previous prime is 203042423063. The next prime is 203042423147. The reversal of 203042423121 is 121324240302.

It is a happy number.

It is not a de Polignac number, because 203042423121 - 2¹⁰ = 203042422097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203042423091 and 203042423100.

It is not an unprimeable number, because it can be changed into a prime (203042423191) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1317241 + ... + 1463286.

It is an arithmetic number, because the mean of its divisors is an integer number (17158638288).

Almost surely, 2^203042423121 is an apocalyptic number.

It is an amenable number.

203042423121 is a deficient number, since it is larger than the sum of its proper divisors (71495789487).

203042423121 is a wasteful number, since it uses less digits than its factorization.

203042423121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2780872.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 203042423121 its reverse (121324240302), we get a palindrome (324366663423).

The spelling of 203042423121 in words is "two hundred three billion, forty-two million, four hundred twenty-three thousand, one hundred twenty-one".