12402332443421 has 2 divisors, whose sum is σ = 12402332443422. Its totient is φ = 12402332443420.

The previous prime is 12402332443367. The next prime is 12402332443429. The reversal of 12402332443421 is 12434423320421.

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., 11526262651225 + 876069792196 = 3395035^2 + 935986^2 .

It is a cyclic number.

It is not a de Polignac number, because 12402332443421 - 2⁶ = 12402332443357 is a prime.

It is a super-2 number, since 2×12402332443421² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12402332443429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6201166221710 + 6201166221711.

It is an arithmetic number, because the mean of its divisors is an integer number (6201166221711).

Almost surely, 2^{12402332443421} is an apocalyptic number.

It is an amenable number.

12402332443421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12402332443421 is an equidigital number, since it uses as much as digits as its factorization.

12402332443421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 110592, while the sum is 35.

Adding to 12402332443421 its reverse (12434423320421), we get a palindrome (24836755763842).

The spelling of 12402332443421 in words is "twelve trillion, four hundred two billion, three hundred thirty-two million, four hundred forty-three thousand, four hundred twenty-one".