12110221205 has 4 divisors (see below), whose sum is σ = 14532265452. Its totient is φ = 9688176960.

The previous prime is 12110221171. The next prime is 12110221229. The reversal of 12110221205 is 50212201121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4907983249 + 7202237956 = 70057^2 + 84866^2 .

It is not a de Polignac number, because 12110221205 - 2⁶ = 12110221141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1211022116 + ... + 1211022125.

It is an arithmetic number, because the mean of its divisors is an integer number (3633066363).

Almost surely, 2^12110221205 is an apocalyptic number.

It is an amenable number.

12110221205 is a deficient number, since it is larger than the sum of its proper divisors (2422044247).

12110221205 is an equidigital number, since it uses as much as digits as its factorization.

12110221205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2422044246.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 12110221205 its reverse (50212201121), we get a palindrome (62322422326).

The spelling of 12110221205 in words is "twelve billion, one hundred ten million, two hundred twenty-one thousand, two hundred five".