12131103 has 4 divisors (see below), whose sum is σ = 16174808. Its totient is φ = 8087400.

The previous prime is 12131099. The next prime is 12131113. The reversal of 12131103 is 30113121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12131103 - 2² = 12131099 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 (12131113) 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, 2021848 + ... + 2021853.

It is an arithmetic number, because the mean of its divisors is an integer number (4043702).

Almost surely, 2^12131103 is an apocalyptic number.

12131103 is a deficient number, since it is larger than the sum of its proper divisors (4043705).

12131103 is an equidigital number, since it uses as much as digits as its factorization.

12131103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043704.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 12131103 is about 3482.9732987779. The cubic root of 12131103 is about 229.7735831067.

Adding to 12131103 its reverse (30113121), we get a palindrome (42244224).

The spelling of 12131103 in words is "twelve million, one hundred thirty-one thousand, one hundred three".