12001112221 has 8 divisors (see below), whose sum is σ = 13732148160. Its totient is φ = 10274224128.

The previous prime is 12001112203. The next prime is 12001112251. The reversal of 12001112221 is 12221110021.

12001112221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12001112221 - 2⁷ = 12001112093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001112251) 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 7 ways as a sum of consecutive naturals, for example, 1030756 + ... + 1042333.

It is an arithmetic number, because the mean of its divisors is an integer number (1716518520).

Almost surely, 2^12001112221 is an apocalyptic number.

It is an amenable number.

12001112221 is a deficient number, since it is larger than the sum of its proper divisors (1731035939).

12001112221 is an equidigital number, since it uses as much as digits as its factorization.

12001112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2073923.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12001112221 its reverse (12221110021), we get a palindrome (24222222242).

The spelling of 12001112221 in words is "twelve billion, one million, one hundred twelve thousand, two hundred twenty-one".