12103231 has 4 divisors (see below), whose sum is σ = 13832272. Its totient is φ = 10374192.

The previous prime is 12103213. The next prime is 12103243. The reversal of 12103231 is 13230121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13230121 = 97 ⋅136393.

It is a cyclic number.

It is not a de Polignac number, because 12103231 - 2¹⁵ = 12070463 is a prime.

It is a super-3 number, since 3×12103231³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103271) 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, 864510 + ... + 864523.

It is an arithmetic number, because the mean of its divisors is an integer number (3458068).

Almost surely, 2^12103231 is an apocalyptic number.

12103231 is a deficient number, since it is larger than the sum of its proper divisors (1729041).

12103231 is an equidigital number, since it uses as much as digits as its factorization.

12103231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729040.

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

The square root of 12103231 is about 3478.9698187826. The cubic root of 12103231 is about 229.5974749021.

Adding to 12103231 its reverse (13230121), we get a palindrome (25333352).

The spelling of 12103231 in words is "twelve million, one hundred three thousand, two hundred thirty-one".