12111972843 has 8 divisors (see below), whose sum is σ = 16212135888. Its totient is φ = 8043229184.

The previous prime is 12111972839. The next prime is 12111972863. The reversal of 12111972843 is 34827911121.

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

It is a cyclic number.

It is not a de Polignac number, because 12111972843 - 2² = 12111972839 is a prime.

It is a super-2 number, since 2×12111972843² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12111972863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7853946 + ... + 7855487.

It is an arithmetic number, because the mean of its divisors is an integer number (2026516986).

Almost surely, 2^12111972843 is an apocalyptic number.

12111972843 is a deficient number, since it is larger than the sum of its proper divisors (4100163045).

12111972843 is a wasteful number, since it uses less digits than its factorization.

12111972843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15709693.

The product of its digits is 24192, while the sum is 39.

The spelling of 12111972843 in words is "twelve billion, one hundred eleven million, nine hundred seventy-two thousand, eight hundred forty-three".