12110221221 has 16 divisors (see below), whose sum is σ = 18492211200. Its totient is φ = 6905673648.

The previous prime is 12110221171. The next prime is 12110221229. The reversal of 12110221221 is 12212201121.

It is not a de Polignac number, because 12110221221 - 2⁷ = 12110221093 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12110221221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12110221229) 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 15 ways as a sum of consecutive naturals, for example, 591901 + ... + 612018.

It is an arithmetic number, because the mean of its divisors is an integer number (1155763200).

Almost surely, 2^12110221221 is an apocalyptic number.

It is an amenable number.

12110221221 is a deficient number, since it is larger than the sum of its proper divisors (6381989979).

12110221221 is a wasteful number, since it uses less digits than its factorization.

12110221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204408.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12110221221 its reverse (12212201121), we get a palindrome (24322422342).

The spelling of 12110221221 in words is "twelve billion, one hundred ten million, two hundred twenty-one thousand, two hundred twenty-one".