12011220166 has 8 divisors (see below), whose sum is σ = 19654723944. Its totient is φ = 5459645520.

The previous prime is 12011220163. The next prime is 12011220167. The reversal of 12011220166 is 66102211021.

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

It is a super-2 number, since 2×12011220166² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22), and also a Moran number because the ratio is a prime number: 545964553 = 12011220166 / (1 + 2 + 0 + 1 + 1 + 2 + 2 + 0 + 1 + 6 + 6).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011220161) 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 3 ways as a sum of consecutive naturals, for example, 272982255 + ... + 272982298.

It is an arithmetic number, because the mean of its divisors is an integer number (2456840493).

Almost surely, 2^12011220166 is an apocalyptic number.

12011220166 is a deficient number, since it is larger than the sum of its proper divisors (7643503778).

12011220166 is a wasteful number, since it uses less digits than its factorization.

12011220166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545964566.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 12011220166 its reverse (66102211021), we get a palindrome (78113431187).

The spelling of 12011220166 in words is "twelve billion, eleven million, two hundred twenty thousand, one hundred sixty-six".