211122011 has 2 divisors, whose sum is σ = 211122012. Its totient is φ = 211122010.

The previous prime is 211122007. The next prime is 211122013. The reversal of 211122011 is 110221112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211122011 - 2² = 211122007 is a prime.

Together with 211122013, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211121983 and 211122001.

It is not a weakly prime, because it can be changed into another prime (211122013) 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, 105561005 + 105561006.

It is an arithmetic number, because the mean of its divisors is an integer number (105561006).

Almost surely, 2^211122011 is an apocalyptic number.

211122011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211122011 is an equidigital number, since it uses as much as digits as its factorization.

211122011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 211122011 is about 14530.0382311954. The cubic root of 211122011 is about 595.4489101013.

Adding to 211122011 its reverse (110221112), we get a palindrome (321343123).

The spelling of 211122011 in words is "two hundred eleven million, one hundred twenty-two thousand, eleven".