12420544401 has 8 divisors (see below), whose sum is σ = 18400806560. Its totient is φ = 8280362916.

The previous prime is 12420544391. The next prime is 12420544429. The reversal of 12420544401 is 10444502421.

12420544401 is a `hidden beast` number, since 12 + 4 + 205 + 4 + 440 + 1 = 666.

12420544401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12420544401 - 2⁶ = 12420544337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 460020163 = 12420544401 / (1 + 2 + 4 + 2 + 0 + 5 + 4 + 4 + 4 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12420544481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230010055 + ... + 230010108.

It is an arithmetic number, because the mean of its divisors is an integer number (2300100820).

Almost surely, 2^12420544401 is an apocalyptic number.

It is an amenable number.

12420544401 is a deficient number, since it is larger than the sum of its proper divisors (5980262159).

12420544401 is an equidigital number, since it uses as much as digits as its factorization.

12420544401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460020172 (or 460020166 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The spelling of 12420544401 in words is "twelve billion, four hundred twenty million, five hundred forty-four thousand, four hundred one".