12156219242 has 8 divisors (see below), whose sum is σ = 18727148676. Its totient is φ = 5913836352.

The previous prime is 12156219221. The next prime is 12156219281. The reversal of 12156219242 is 24291265121.

12156219242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11715681121 + 440538121 = 108239^2 + 20989^2 .

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, 82136543 + ... + 82136690.

Almost surely, 2^12156219242 is an apocalyptic number.

12156219242 is a deficient number, since it is larger than the sum of its proper divisors (6570929434).

12156219242 is a wasteful number, since it uses less digits than its factorization.

12156219242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164273272.

The product of its digits is 17280, while the sum is 35.

The spelling of 12156219242 in words is "twelve billion, one hundred fifty-six million, two hundred nineteen thousand, two hundred forty-two".