12004122421 has 2 divisors, whose sum is σ = 12004122422. Its totient is φ = 12004122420.

The previous prime is 12004122401. The next prime is 12004122479. The reversal of 12004122421 is 12422140021.

12004122421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7566564196 + 4437558225 = 86986^2 + 66615^2 .

It is an emirp because it is prime and its reverse (12422140021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12004122421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12004122401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6002061210 + 6002061211.

It is an arithmetic number, because the mean of its divisors is an integer number (6002061211).

Almost surely, 2^12004122421 is an apocalyptic number.

It is an amenable number.

12004122421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12004122421 is an equidigital number, since it uses as much as digits as its factorization.

12004122421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 12004122421 its reverse (12422140021), we get a palindrome (24426262442).

The spelling of 12004122421 in words is "twelve billion, four million, one hundred twenty-two thousand, four hundred twenty-one".