212122100221211 has 2 divisors, whose sum is σ = 212122100221212. Its totient is φ = 212122100221210.

The previous prime is 212122100221153. The next prime is 212122100221219. The reversal of 212122100221211 is 112122001221212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 212122100221211 - 2¹⁸ = 212122099959067 is a prime.

It is not a weakly prime, because it can be changed into another prime (212122100221219) 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, 106061050110605 + 106061050110606.

It is an arithmetic number, because the mean of its divisors is an integer number (106061050110606).

Almost surely, 2^{212122100221211} is an apocalyptic number.

212122100221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

212122100221211 is an equidigital number, since it uses as much as digits as its factorization.

212122100221211 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 212122100221211 its reverse (112122001221212), we get a palindrome (324244101442423).

The spelling of 212122100221211 in words is "two hundred twelve trillion, one hundred twenty-two billion, one hundred million, two hundred twenty-one thousand, two hundred eleven".