12408388422421 has 8 divisors (see below), whose sum is σ = 12423708739800. Its totient is φ = 12393068609280.

The previous prime is 12408388422407. The next prime is 12408388422481. The reversal of 12408388422421 is 12422488380421.

It can be written as a sum of positive squares in 4 ways, for example, as 1091293622500 + 11317094799921 = 1044650^2 + 3364089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12408388422421 - 2¹⁷ = 12408388291349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12408388422481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81768865 + ... + 81920473.

It is an arithmetic number, because the mean of its divisors is an integer number (1552963592475).

Almost surely, 2^{12408388422421} is an apocalyptic number.

It is an amenable number.

12408388422421 is a deficient number, since it is larger than the sum of its proper divisors (15320317379).

12408388422421 is an equidigital number, since it uses as much as digits as its factorization.

12408388422421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252119.

The product of its (nonzero) digits is 1572864, while the sum is 49.

The spelling of 12408388422421 in words is "twelve trillion, four hundred eight billion, three hundred eighty-eight million, four hundred twenty-two thousand, four hundred twenty-one".