210103 has 6 divisors (see below), whose sum is σ = 223496. Its totient is φ = 197472.

The previous prime is 210101. The next prime is 210109. The reversal of 210103 is 301012.

It is not a de Polignac number, because 210103 - 2¹ = 210101 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75 + ... + 652.

2²¹⁰¹⁰³ is an apocalyptic number.

210103 is a deficient number, since it is larger than the sum of its proper divisors (13393).

210103 is an equidigital number, since it uses as much as digits as its factorization.

210103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 7.

The square root of 210103 is about 458.3699379322. The cubic root of 210103 is about 59.4489357799.

Adding to 210103 its reverse (301012), we get a palindrome (511115).

Subtracting 210103 from its reverse (301012), we obtain a palindrome (90909).

It can be divided in two parts, 210 and 103, that added together give a palindrome (313).

The spelling of 210103 in words is "two hundred ten thousand, one hundred three", and thus it is an iban number.