12104313221 has 16 divisors (see below), whose sum is σ = 16251946368. Its totient is φ = 8706398400.

The previous prime is 12104313203. The next prime is 12104313269. The reversal of 12104313221 is 12231340121.

It is a de Polignac number, because none of the positive numbers 2^k-12104313221 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12104313193 and 12104313202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12104313121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6045110 + ... + 6047111.

It is an arithmetic number, because the mean of its divisors is an integer number (1015746648).

Almost surely, 2^12104313221 is an apocalyptic number.

12104313221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12104313221 is a deficient number, since it is larger than the sum of its proper divisors (4147633147).

12104313221 is a wasteful number, since it uses less digits than its factorization.

12104313221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12092252.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 12104313221 its reverse (12231340121), we get a palindrome (24335653342).

The spelling of 12104313221 in words is "twelve billion, one hundred four million, three hundred thirteen thousand, two hundred twenty-one".