12155411215 has 16 divisors (see below), whose sum is σ = 15432167520. Its totient is φ = 9165744000.

The previous prime is 12155411207. The next prime is 12155411263. The reversal of 12155411215 is 51211455121.

12155411215 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 12155411215 - 2³ = 12155411207 is a prime.

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, 306036 + ... + 343465.

It is an arithmetic number, because the mean of its divisors is an integer number (964510470).

Almost surely, 2^12155411215 is an apocalyptic number.

12155411215 is a deficient number, since it is larger than the sum of its proper divisors (3276756305).

12155411215 is a wasteful number, since it uses less digits than its factorization.

12155411215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649722.

The product of its digits is 2000, while the sum is 28.

Adding to 12155411215 its reverse (51211455121), we get a palindrome (63366866336).

The spelling of 12155411215 in words is "twelve billion, one hundred fifty-five million, four hundred eleven thousand, two hundred fifteen".