12203129 has 4 divisors (see below), whose sum is σ = 12211584. Its totient is φ = 12194676.

The previous prime is 12203089. The next prime is 12203137. The reversal of 12203129 is 92130221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 92130221 = 19 ⋅4848959.

It is a cyclic number.

It is not a de Polignac number, because 12203129 - 2⁸ = 12202873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12203129.

It is not an unprimeable number, because it can be changed into a prime (12203929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1457 + ... + 5150.

It is an arithmetic number, because the mean of its divisors is an integer number (3052896).

Almost surely, 2^12203129 is an apocalyptic number.

It is an amenable number.

12203129 is a deficient number, since it is larger than the sum of its proper divisors (8455).

12203129 is an equidigital number, since it uses as much as digits as its factorization.

12203129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8454.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 12203129 is about 3493.2977256455. The cubic root of 12203129 is about 230.2274309898.

The spelling of 12203129 in words is "twelve million, two hundred three thousand, one hundred twenty-nine".