203103001111 has 4 divisors (see below), whose sum is σ = 203114854800. Its totient is φ = 203091147424.

The previous prime is 203103001081. The next prime is 203103001117. The reversal of 203103001111 is 111100301302.

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 203103001111 - 2⁷ = 203103000983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203103001091 and 203103001100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203103001117) 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, 5901106 + ... + 5935423.

It is an arithmetic number, because the mean of its divisors is an integer number (50778713700).

Almost surely, 2^203103001111 is an apocalyptic number.

203103001111 is a deficient number, since it is larger than the sum of its proper divisors (11853689).

203103001111 is a wasteful number, since it uses less digits than its factorization.

203103001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11853688.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 203103001111 its reverse (111100301302), we get a palindrome (314203302413).

The spelling of 203103001111 in words is "two hundred three billion, one hundred three million, one thousand, one hundred eleven".