12011124221 has 2 divisors, whose sum is σ = 12011124222. Its totient is φ = 12011124220.

The previous prime is 12011124217. The next prime is 12011124233. The reversal of 12011124221 is 12242111021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9445701721 + 2565422500 = 97189^2 + 50650^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011124221 - 2² = 12011124217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12011124221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011124211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005562110 + 6005562111.

It is an arithmetic number, because the mean of its divisors is an integer number (6005562111).

Almost surely, 2^12011124221 is an apocalyptic number.

It is an amenable number.

12011124221 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011124221 is an equidigital number, since it uses as much as digits as its factorization.

12011124221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 12011124221 its reverse (12242111021), we get a palindrome (24253235242).

The spelling of 12011124221 in words is "twelve billion, eleven million, one hundred twenty-four thousand, two hundred twenty-one".