12155112055 has 16 divisors (see below), whose sum is σ = 15128570880. Its totient is φ = 9364219648.

The previous prime is 12155112049. The next prime is 12155112097. The reversal of 12155112055 is 55021155121.

It is a cyclic number.

It is not a de Polignac number, because 12155112055 - 2²¹ = 12153014903 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53902 + ... + 164971.

It is an arithmetic number, because the mean of its divisors is an integer number (945535680).

Almost surely, 2^12155112055 is an apocalyptic number.

12155112055 is a deficient number, since it is larger than the sum of its proper divisors (2973458825).

12155112055 is a wasteful number, since it uses less digits than its factorization.

12155112055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219290.

The product of its (nonzero) digits is 2500, while the sum is 28.

Adding to 12155112055 its reverse (55021155121), we get a palindrome (67176267176).

The spelling of 12155112055 in words is "twelve billion, one hundred fifty-five million, one hundred twelve thousand, fifty-five".