12121001221211 has 2 divisors, whose sum is σ = 12121001221212. Its totient is φ = 12121001221210.

The previous prime is 12121001221177. The next prime is 12121001221261. The reversal of 12121001221211 is 11212210012121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121001221211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12121001221211.

It is not a weakly prime, because it can be changed into another prime (12121001221261) 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, 6060500610605 + 6060500610606.

It is an arithmetic number, because the mean of its divisors is an integer number (6060500610606).

Almost surely, 2^{12121001221211} is an apocalyptic number.

12121001221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121001221211 is an equidigital number, since it uses as much as digits as its factorization.

12121001221211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12121001221211 its reverse (11212210012121), we get a palindrome (23333211233332).

The spelling of 12121001221211 in words is "twelve trillion, one hundred twenty-one billion, one million, two hundred twenty-one thousand, two hundred eleven".