12214421421421 has 2 divisors, whose sum is σ = 12214421421422. Its totient is φ = 12214421421420.

The previous prime is 12214421421401. The next prime is 12214421421431. The reversal of 12214421421421 is 12412412441221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11445974576100 + 768446845321 = 3383190^2 + 876611^2 .

It is a cyclic number.

It is not a de Polignac number, because 12214421421421 - 2²³ = 12214413032813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12214421421401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6107210710710 + 6107210710711.

It is an arithmetic number, because the mean of its divisors is an integer number (6107210710711).

Almost surely, 2^{12214421421421} is an apocalyptic number.

It is an amenable number.

12214421421421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12214421421421 is an equidigital number, since it uses as much as digits as its factorization.

12214421421421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8192, while the sum is 31.

Adding to 12214421421421 its reverse (12412412441221), we get a palindrome (24626833862642).

The spelling of 12214421421421 in words is "twelve trillion, two hundred fourteen billion, four hundred twenty-one million, four hundred twenty-one thousand, four hundred twenty-one".