12103 has 12 divisors (see below), whose sum is σ = 15960. Its totient is φ = 9072.

The previous prime is 12101. The next prime is 12107. The reversal of 12103 is 30121.

12103 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 12103 - 2¹ = 12101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (7).

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

12103 is a lucky number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 628 + ... + 646.

It is an arithmetic number, because the mean of its divisors is an integer number (1330).

12103 is a Friedman number, since it can be written as 110^2+3, using all its digits and the basic arithmetic operations.

2¹²¹⁰³ is an apocalyptic number.

12103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12103 is a deficient number, since it is larger than the sum of its proper divisors (3857).

12103 is a wasteful number, since it uses less digits than its factorization.

12103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46 (or 39 counting only the distinct ones).

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

The square root of 12103 is about 110.0136355185. The cubic root of 12103 is about 22.9596014208.

Adding to 12103 its reverse (30121), we get a palindrome (42224).

The spelling of 12103 in words is "twelve thousand, one hundred three", and thus it is an iban number.