12355021555555 has 32 divisors (see below), whose sum is σ = 17059254524928. Its totient is φ = 8414422128000.

The previous prime is 12355021555553. The next prime is 12355021555561. The reversal of 12355021555555 is 55555512055321.

It is a happy number.

It is not a de Polignac number, because 12355021555555 - 2¹ = 12355021555553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12355021555499 and 12355021555508.

It is not an unprimeable number, because it can be changed into a prime (12355021555553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30137584 + ... + 30544786.

It is an arithmetic number, because the mean of its divisors is an integer number (533101703904).

Almost surely, 2^{12355021555555} is an apocalyptic number.

12355021555555 is a deficient number, since it is larger than the sum of its proper divisors (4704232969373).

12355021555555 is a wasteful number, since it uses less digits than its factorization.

12355021555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413107.

The product of its (nonzero) digits is 4687500, while the sum is 49.

The spelling of 12355021555555 in words is "twelve trillion, three hundred fifty-five billion, twenty-one million, five hundred fifty-five thousand, five hundred fifty-five".