12134221 has 4 divisors (see below), whose sum is σ = 13237344. Its totient is φ = 11031100.

The previous prime is 12134203. The next prime is 12134233. The reversal of 12134221 is 12243121.

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 an emirpimes, since its reverse is a distinct semiprime: 12243121 = 11 ⋅1113011.

It is a cyclic number.

It is not a de Polignac number, because 12134221 - 2⁵ = 12134189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12134195 and 12134204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12134201) 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, 551545 + ... + 551566.

It is an arithmetic number, because the mean of its divisors is an integer number (3309336).

Almost surely, 2^12134221 is an apocalyptic number.

12134221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12134221 is a deficient number, since it is larger than the sum of its proper divisors (1103123).

12134221 is a wasteful number, since it uses less digits than its factorization.

12134221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103122.

The product of its digits is 96, while the sum is 16.

The square root of 12134221 is about 3483.4208760929. The cubic root of 12134221 is about 229.7932672926.

Adding to 12134221 its reverse (12243121), we get a palindrome (24377342).

Subtracting 12134221 from its reverse (12243121), we obtain a square (108900 = 330²).

The spelling of 12134221 in words is "twelve million, one hundred thirty-four thousand, two hundred twenty-one".