211122122011 has 2 divisors, whose sum is σ = 211122122012. Its totient is φ = 211122122010.

The previous prime is 211122121943. The next prime is 211122122039. The reversal of 211122122011 is 110221221112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211122122011 - 2⁷ = 211122121883 is a prime.

It is not a weakly prime, because it can be changed into another prime (211122222011) 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, 105561061005 + 105561061006.

It is an arithmetic number, because the mean of its divisors is an integer number (105561061006).

Almost surely, 2^211122122011 is an apocalyptic number.

211122122011 is a deficient number, since it is larger than the sum of its proper divisors (1).

211122122011 is an equidigital number, since it uses as much as digits as its factorization.

211122122011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211122122011 its reverse (110221221112), we get a palindrome (321343343123).

The spelling of 211122122011 in words is "two hundred eleven billion, one hundred twenty-two million, one hundred twenty-two thousand, eleven".