203203111103 has 4 divisors (see below), whose sum is σ = 207526581600. Its totient is φ = 198879640608.

The previous prime is 203203111087. The next prime is 203203111109. The reversal of 203203111103 is 301111302302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301111302302 = 2 ⋅150555651151.

It is a cyclic number.

It is not a de Polignac number, because 203203111103 - 2⁴ = 203203111087 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 (203203111109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2161735178 + ... + 2161735271.

It is an arithmetic number, because the mean of its divisors is an integer number (51881645400).

Almost surely, 2^203203111103 is an apocalyptic number.

203203111103 is a deficient number, since it is larger than the sum of its proper divisors (4323470497).

203203111103 is an equidigital number, since it uses as much as digits as its factorization.

203203111103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4323470496.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 203203111103 its reverse (301111302302), we get a palindrome (504314413405).

The spelling of 203203111103 in words is "two hundred three billion, two hundred three million, one hundred eleven thousand, one hundred three".