203112103 has 4 divisors (see below), whose sum is σ = 211943088. Its totient is φ = 194281120.

The previous prime is 203112089. The next prime is 203112131. The reversal of 203112103 is 301211302.

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 203112103 - 2⁹ = 203111591 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 (203112163) 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, 4415458 + ... + 4415503.

It is an arithmetic number, because the mean of its divisors is an integer number (52985772).

Almost surely, 2^203112103 is an apocalyptic number.

203112103 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

203112103 is a deficient number, since it is larger than the sum of its proper divisors (8830985).

203112103 is an equidigital number, since it uses as much as digits as its factorization.

203112103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8830984.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 203112103 is about 14251.7403498660. The cubic root of 203112103 is about 587.8212305742.

Adding to 203112103 its reverse (301211302), we get a palindrome (504323405).

The spelling of 203112103 in words is "two hundred three million, one hundred twelve thousand, one hundred three".