100203103 has 16 divisors (see below), whose sum is σ = 134539776. Its totient is φ = 72073440.

The previous prime is 100203073. The next prime is 100203119. The reversal of 100203103 is 301302001.

It is a cyclic number.

It is not a de Polignac number, because 100203103 - 2⁵ = 100203071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100203103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100203143) 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 15 ways as a sum of consecutive naturals, for example, 49051 + ... + 51052.

It is an arithmetic number, because the mean of its divisors is an integer number (8408736).

Almost surely, 2^100203103 is an apocalyptic number.

100203103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100203103 is a deficient number, since it is larger than the sum of its proper divisors (34336673).

100203103 is a wasteful number, since it uses less digits than its factorization.

100203103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100134.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 100203103 is about 10010.1499988761. The cubic root of 100203103 is about 464.4729110629.

Adding to 100203103 its reverse (301302001), we get a palindrome (401505104).

It can be divided in two parts, 100 and 203103, that added together give a triangular number (203203 = T₆₃₇).

The spelling of 100203103 in words is "one hundred million, two hundred three thousand, one hundred three".