12001221220112 has 30 divisors (see below), whose sum is σ = 23420853403038. Its totient is φ = 5957440596096.

The previous prime is 12001221220111. The next prime is 12001221220127. The reversal of 12001221220112 is 21102212210021.

It can be written as a sum of positive squares in only one way, i.e., 8266062005776 + 3735159214336 = 2875076^2 + 1932656^2 .

It is not an unprimeable number, because it can be changed into a prime (12001221220111) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 19101773 + ... + 19720044.

Almost surely, 2^{12001221220112} is an apocalyptic number.

It is an amenable number.

12001221220112 is a deficient number, since it is larger than the sum of its proper divisors (11419632182926).

12001221220112 is an equidigital number, since it uses as much as digits as its factorization.

12001221220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38822103 (or 38821958 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12001221220112 its reverse (21102212210021), we get a palindrome (33103433430133).

The spelling of 12001221220112 in words is "twelve trillion, one billion, two hundred twenty-one million, two hundred twenty thousand, one hundred twelve".