2211211103221 has 2 divisors, whose sum is σ = 2211211103222. Its totient is φ = 2211211103220.

The previous prime is 2211211103219. The next prime is 2211211103261. The reversal of 2211211103221 is 1223011121122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1269610632900 + 941600470321 = 1126770^2 + 970361^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211211103221 - 2¹ = 2211211103219 is a prime.

Together with 2211211103219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211211103261) 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, 1105605551610 + 1105605551611.

It is an arithmetic number, because the mean of its divisors is an integer number (1105605551611).

Almost surely, 2^{2211211103221} is an apocalyptic number.

It is an amenable number.

2211211103221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211211103221 is an equidigital number, since it uses as much as digits as its factorization.

2211211103221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2211211103221 its reverse (1223011121122), we get a palindrome (3434222224343).

The spelling of 2211211103221 in words is "two trillion, two hundred eleven billion, two hundred eleven million, one hundred three thousand, two hundred twenty-one".