203111310103 has 4 divisors (see below), whose sum is σ = 218735257048. Its totient is φ = 187487363160.

The previous prime is 203111310071. The next prime is 203111310109. The reversal of 203111310103 is 301013111302.

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 203111310103 - 2⁵ = 203111310071 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 (203111310109) 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, 7811973453 + ... + 7811973478.

It is an arithmetic number, because the mean of its divisors is an integer number (54683814262).

Almost surely, 2^203111310103 is an apocalyptic number.

203111310103 is a deficient number, since it is larger than the sum of its proper divisors (15623946945).

203111310103 is a wasteful number, since it uses less digits than its factorization.

203111310103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15623946944.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 203111310103 its reverse (301013111302), we get a palindrome (504124421405).

The spelling of 203111310103 in words is "two hundred three billion, one hundred eleven million, three hundred ten thousand, one hundred three".