12156219243 has 36 divisors (see below), whose sum is σ = 20433703368. Its totient is φ = 6943708800.

The previous prime is 12156219221. The next prime is 12156219281. The reversal of 12156219243 is 34291265121.

12156219243 is a `hidden beast` number, since 1 + 2 + 1 + 5 + 621 + 9 + 24 + 3 = 666.

It is not a de Polignac number, because 12156219243 - 2⁹ = 12156218731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12156219198 and 12156219207.

It is not an unprimeable number, because it can be changed into a prime (12156219343) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1881168 + ... + 1887618.

Almost surely, 2^12156219243 is an apocalyptic number.

12156219243 is a deficient number, since it is larger than the sum of its proper divisors (8277484125).

12156219243 is a wasteful number, since it uses less digits than its factorization.

12156219243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10744 (or 10734 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 12156219243 in words is "twelve billion, one hundred fifty-six million, two hundred nineteen thousand, two hundred forty-three".