12155112044 has 24 divisors (see below), whose sum is σ = 21494558736. Its totient is φ = 6013880000.

The previous prime is 12155112043. The next prime is 12155112049. The reversal of 12155112044 is 44021155121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12155112043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 772334 + ... + 787914.

It is an arithmetic number, because the mean of its divisors is an integer number (895606614).

Almost surely, 2^12155112044 is an apocalyptic number.

It is an amenable number.

12155112044 is a deficient number, since it is larger than the sum of its proper divisors (9339446692).

12155112044 is a wasteful number, since it uses less digits than its factorization.

12155112044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17617 (or 17615 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

Adding to 12155112044 its reverse (44021155121), we get a palindrome (56176267165).

The spelling of 12155112044 in words is "twelve billion, one hundred fifty-five million, one hundred twelve thousand, forty-four".