203123004011 has 4 divisors (see below), whose sum is σ = 211954438992. Its totient is φ = 194291569032.

The previous prime is 203123004001. The next prime is 203123004023. The reversal of 203123004011 is 110400321302.

203123004011 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 a cyclic number.

It is not a de Polignac number, because 203123004011 - 2³⁰ = 202049262187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203123004001) 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, 4415717456 + ... + 4415717501.

It is an arithmetic number, because the mean of its divisors is an integer number (52988609748).

Almost surely, 2^203123004011 is an apocalyptic number.

203123004011 is a deficient number, since it is larger than the sum of its proper divisors (8831434981).

203123004011 is an equidigital number, since it uses as much as digits as its factorization.

203123004011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8831434980.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 203123004011 its reverse (110400321302), we get a palindrome (313523325313).

The spelling of 203123004011 in words is "two hundred three billion, one hundred twenty-three million, four thousand, eleven".