12155555003 has 4 divisors (see below), whose sum is σ = 12161432160. Its totient is φ = 12149677848.

The previous prime is 12155554951. The next prime is 12155555021. The reversal of 12155555003 is 30055555121.

12155555003 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30055555121 = 1697 ⋅17710993.

It is a cyclic number.

It is not a de Polignac number, because 12155555003 - 2³⁰ = 11081813179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12155555603) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2935475 + ... + 2939612.

It is an arithmetic number, because the mean of its divisors is an integer number (3040358040).

Almost surely, 2^12155555003 is an apocalyptic number.

12155555003 is a deficient number, since it is larger than the sum of its proper divisors (5877157).

12155555003 is an equidigital number, since it uses as much as digits as its factorization.

12155555003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5877156.

The product of its (nonzero) digits is 18750, while the sum is 32.

The spelling of 12155555003 in words is "twelve billion, one hundred fifty-five million, five hundred fifty-five thousand, three".