12184748221 has 4 divisors (see below), whose sum is σ = 12481937244. Its totient is φ = 11887559200.

The previous prime is 12184748179. The next prime is 12184748237. The reversal of 12184748221 is 12284748121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12284748121 = 12227 ⋅1004723.

It can be written as a sum of positive squares in 2 ways, for example, as 1879656025 + 10305092196 = 43355^2 + 101514^2 .

It is a cyclic number.

It is not a de Polignac number, because 12184748221 - 2²⁹ = 11647877309 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 (12184749221) 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, 148594450 + ... + 148594531.

It is an arithmetic number, because the mean of its divisors is an integer number (3120484311).

Almost surely, 2^12184748221 is an apocalyptic number.

It is an amenable number.

12184748221 is a deficient number, since it is larger than the sum of its proper divisors (297189023).

12184748221 is an equidigital number, since it uses as much as digits as its factorization.

12184748221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297189022.

The product of its digits is 57344, while the sum is 40.

The spelling of 12184748221 in words is "twelve billion, one hundred eighty-four million, seven hundred forty-eight thousand, two hundred twenty-one".