12404040253021 has 2 divisors, whose sum is σ = 12404040253022. Its totient is φ = 12404040253020.

The previous prime is 12404040253009. The next prime is 12404040253037. The reversal of 12404040253021 is 12035204040421.

12404040253021 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., 10713910250521 + 1690130002500 = 3273211^2 + 1300050^2 .

It is a cyclic number.

It is not a de Polignac number, because 12404040253021 - 2¹⁹ = 12404039728733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12404040253001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6202020126510 + 6202020126511.

It is an arithmetic number, because the mean of its divisors is an integer number (6202020126511).

Almost surely, 2^{12404040253021} is an apocalyptic number.

It is an amenable number.

12404040253021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12404040253021 is an equidigital number, since it uses as much as digits as its factorization.

12404040253021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 12404040253021 its reverse (12035204040421), we get a palindrome (24439244293442).

The spelling of 12404040253021 in words is "twelve trillion, four hundred four billion, forty million, two hundred fifty-three thousand, twenty-one".