12403524245221 has 2 divisors, whose sum is σ = 12403524245222. Its totient is φ = 12403524245220.

The previous prime is 12403524245207. The next prime is 12403524245239. The reversal of 12403524245221 is 12254242530421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9222245344225 + 3181278900996 = 3036815^2 + 1783614^2 .

It is a cyclic number.

It is not a de Polignac number, because 12403524245221 - 2¹³ = 12403524237029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12403524245291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6201762122610 + 6201762122611.

It is an arithmetic number, because the mean of its divisors is an integer number (6201762122611).

Almost surely, 2^{12403524245221} is an apocalyptic number.

It is an amenable number.

12403524245221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12403524245221 is an equidigital number, since it uses as much as digits as its factorization.

12403524245221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 12403524245221 its reverse (12254242530421), we get a palindrome (24657766775642).

The spelling of 12403524245221 in words is "twelve trillion, four hundred three billion, five hundred twenty-four million, two hundred forty-five thousand, two hundred twenty-one".