211121212222211 has 2 divisors, whose sum is σ = 211121212222212. Its totient is φ = 211121212222210.

The previous prime is 211121212222199. The next prime is 211121212222229. The reversal of 211121212222211 is 112222212121112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211121212222211 - 2⁶ = 211121212222147 is a prime.

It is not a weakly prime, because it can be changed into another prime (211121212242211) 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, 105560606111105 + 105560606111106.

It is an arithmetic number, because the mean of its divisors is an integer number (105560606111106).

Almost surely, 2^{211121212222211} is an apocalyptic number.

211121212222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

211121212222211 is an equidigital number, since it uses as much as digits as its factorization.

211121212222211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 256, while the sum is 23.

Adding to 211121212222211 its reverse (112222212121112), we get a palindrome (323343424343323).

The spelling of 211121212222211 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred twelve million, two hundred twenty-two thousand, two hundred eleven".