12420042055 has 16 divisors (see below), whose sum is σ = 15271941888. Its totient is φ = 9690912000.

The previous prime is 12420042043. The next prime is 12420042071. The reversal of 12420042055 is 55024002421.

12420042055 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 12420042055 - 2⁷ = 12420041927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 984085 + ... + 996625.

It is an arithmetic number, because the mean of its divisors is an integer number (954496368).

Almost surely, 2^12420042055 is an apocalyptic number.

12420042055 is a deficient number, since it is larger than the sum of its proper divisors (2851899833).

12420042055 is a wasteful number, since it uses less digits than its factorization.

12420042055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17418.

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 12420042055 its reverse (55024002421), we get a palindrome (67444044476).

The spelling of 12420042055 in words is "twelve billion, four hundred twenty million, forty-two thousand, fifty-five".