12213421321 has 2 divisors, whose sum is σ = 12213421322. Its totient is φ = 12213421320.

The previous prime is 12213421313. The next prime is 12213421351. The reversal of 12213421321 is 12312431221.

12213421321 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., 11656225296 + 557196025 = 107964^2 + 23605^2 .

It is a cyclic number.

It is not a de Polignac number, because 12213421321 - 2³ = 12213421313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12213421292 and 12213421301.

It is not a weakly prime, because it can be changed into another prime (12213421301) 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, 6106710660 + 6106710661.

It is an arithmetic number, because the mean of its divisors is an integer number (6106710661).

Almost surely, 2^12213421321 is an apocalyptic number.

It is an amenable number.

12213421321 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213421321 is an equidigital number, since it uses as much as digits as its factorization.

12213421321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 22.

Adding to 12213421321 its reverse (12312431221), we get a palindrome (24525852542).

The spelling of 12213421321 in words is "twelve billion, two hundred thirteen million, four hundred twenty-one thousand, three hundred twenty-one".