203031123123 has 4 divisors (see below), whose sum is σ = 270708164168. Its totient is φ = 135354082080.

The previous prime is 203031123103. The next prime is 203031123193. The reversal of 203031123123 is 321321130302.

203031123123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 203031123123 - 2⁸ = 203031122867 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 203031123123.

It is not an unprimeable number, because it can be changed into a prime (203031123103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33838520518 + ... + 33838520523.

It is an arithmetic number, because the mean of its divisors is an integer number (67677041042).

Almost surely, 2^203031123123 is an apocalyptic number.

203031123123 is a deficient number, since it is larger than the sum of its proper divisors (67677041045).

203031123123 is an equidigital number, since it uses as much as digits as its factorization.

203031123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67677041044.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 203031123123 its reverse (321321130302), we get a palindrome (524352253425).

The spelling of 203031123123 in words is "two hundred three billion, thirty-one million, one hundred twenty-three thousand, one hundred twenty-three".