12141421 has 2 divisors, whose sum is σ = 12141422. Its totient is φ = 12141420.

The previous prime is 12141413. The next prime is 12141427. The reversal of 12141421 is 12414121.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11485321 + 656100 = 3389^2 + 810^2 .

It is an emirp because it is prime and its reverse (12414121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12141421 - 2³ = 12141413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12141395 and 12141404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12141427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6070710 + 6070711.

It is an arithmetic number, because the mean of its divisors is an integer number (6070711).

Almost surely, 2^12141421 is an apocalyptic number.

It is an amenable number.

12141421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12141421 is an equidigital number, since it uses as much as digits as its factorization.

12141421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64, while the sum is 16.

The square root of 12141421 is about 3484.4541896831. The cubic root of 12141421 is about 229.8387085942.

Adding to 12141421 its reverse (12414121), we get a palindrome (24555542).

The spelling of 12141421 in words is "twelve million, one hundred forty-one thousand, four hundred twenty-one".