12011102221 has 2 divisors, whose sum is σ = 12011102222. Its totient is φ = 12011102220.

The previous prime is 12011102189. The next prime is 12011102269. The reversal of 12011102221 is 12220111021.

12011102221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6141856900 + 5869245321 = 78370^2 + 76611^2 .

It is an emirp because it is prime and its reverse (12220111021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12011102221 - 2⁵ = 12011102189 is a prime.

It is a super-2 number, since 2×12011102221² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011102321) 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 as a sum of consecutive naturals, namely, 6005551110 + 6005551111.

It is an arithmetic number, because the mean of its divisors is an integer number (6005551111).

Almost surely, 2^12011102221 is an apocalyptic number.

It is an amenable number.

12011102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011102221 is an equidigital number, since it uses as much as digits as its factorization.

12011102221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12011102221 its reverse (12220111021), we get a palindrome (24231213242).

The spelling of 12011102221 in words is "twelve billion, eleven million, one hundred two thousand, two hundred twenty-one".