12166197043 has 24 divisors (see below), whose sum is σ = 16458798944. Its totient is φ = 8750903040.

The previous prime is 12166197041. The next prime is 12166197049. The reversal of 12166197043 is 34079166121.

It is not a de Polignac number, because 12166197043 - 2¹ = 12166197041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12166196987 and 12166197005.

It is not an unprimeable number, because it can be changed into a prime (12166197041) 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 23 ways as a sum of consecutive naturals, for example, 541446 + ... + 563467.

Almost surely, 2^12166197043 is an apocalyptic number.

12166197043 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12166197043 is a deficient number, since it is larger than the sum of its proper divisors (4292601901).

12166197043 is a wasteful number, since it uses less digits than its factorization.

12166197043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104955 (or 1104944 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 12166197043 in words is "twelve billion, one hundred sixty-six million, one hundred ninety-seven thousand, forty-three".