203042012123 has 2 divisors, whose sum is σ = 203042012124. Its totient is φ = 203042012122.

The previous prime is 203042012009. The next prime is 203042012153. The reversal of 203042012123 is 321210240302.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203042012123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 203042012095 and 203042012104.

It is not a weakly prime, because it can be changed into another prime (203042012153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101521006061 + 101521006062.

It is an arithmetic number, because the mean of its divisors is an integer number (101521006062).

Almost surely, 2^203042012123 is an apocalyptic number.

203042012123 is a deficient number, since it is larger than the sum of its proper divisors (1).

203042012123 is an equidigital number, since it uses as much as digits as its factorization.

203042012123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 203042012123 its reverse (321210240302), we get a palindrome (524252252425).

The spelling of 203042012123 in words is "two hundred three billion, forty-two million, twelve thousand, one hundred twenty-three".