12221212120211 has 2 divisors, whose sum is σ = 12221212120212. Its totient is φ = 12221212120210.

The previous prime is 12221212120207. The next prime is 12221212120213. The reversal of 12221212120211 is 11202121212221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12221212120211 - 2² = 12221212120207 is a prime.

Together with 12221212120213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12221212120213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110606060105 + 6110606060106.

It is an arithmetic number, because the mean of its divisors is an integer number (6110606060106).

Almost surely, 2^{12221212120211} is an apocalyptic number.

12221212120211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12221212120211 is an equidigital number, since it uses as much as digits as its factorization.

12221212120211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12221212120211 its reverse (11202121212221), we get a palindrome (23423333332432).

The spelling of 12221212120211 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty thousand, two hundred eleven".