2121221022211 has 2 divisors, whose sum is σ = 2121221022212. Its totient is φ = 2121221022210.

The previous prime is 2121221022169. The next prime is 2121221022229. The reversal of 2121221022211 is 1122201221212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2121221022211 - 2¹⁹ = 2121220497923 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121221022251) 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, 1060610511105 + 1060610511106.

It is an arithmetic number, because the mean of its divisors is an integer number (1060610511106).

Almost surely, 2^{2121221022211} is an apocalyptic number.

2121221022211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121221022211 is an equidigital number, since it uses as much as digits as its factorization.

2121221022211 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 19.

Adding to 2121221022211 its reverse (1122201221212), we get a palindrome (3243422243423).

The spelling of 2121221022211 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, two hundred eleven".