12104412221 has 4 divisors (see below), whose sum is σ = 13204813344. Its totient is φ = 11004011100.

The previous prime is 12104412181. The next prime is 12104412259. The reversal of 12104412221 is 12221440121.

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: 12221440121 = 11 ⋅1111040011.

It is a cyclic number.

It is not a de Polignac number, because 12104412221 - 2⁶ = 12104412157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12104412193 and 12104412202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12104412121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550200545 + ... + 550200566.

It is an arithmetic number, because the mean of its divisors is an integer number (3301203336).

Almost surely, 2^12104412221 is an apocalyptic number.

12104412221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12104412221 is a deficient number, since it is larger than the sum of its proper divisors (1100401123).

12104412221 is a wasteful number, since it uses less digits than its factorization.

12104412221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100401122.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12104412221 its reverse (12221440121), we get a palindrome (24325852342).

The spelling of 12104412221 in words is "twelve billion, one hundred four million, four hundred twelve thousand, two hundred twenty-one".