12181323506 has 8 divisors (see below), whose sum is σ = 19933074864. Its totient is φ = 5536965220.

The previous prime is 12181323493. The next prime is 12181323523. The reversal of 12181323506 is 60532318121.

12181323506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 276848240 + ... + 276848283.

It is an arithmetic number, because the mean of its divisors is an integer number (2491634358).

Almost surely, 2^12181323506 is an apocalyptic number.

12181323506 is a deficient number, since it is larger than the sum of its proper divisors (7751751358).

12181323506 is a wasteful number, since it uses less digits than its factorization.

12181323506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553696536.

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 12181323506 in words is "twelve billion, one hundred eighty-one million, three hundred twenty-three thousand, five hundred six".