211112011205111 has 2 divisors, whose sum is σ = 211112011205112. Its totient is φ = 211112011205110.

The previous prime is 211112011205087. The next prime is 211112011205113. The reversal of 211112011205111 is 111502110211112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211112011205111 - 2²⁶ = 211111944096247 is a prime.

Together with 211112011205113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211112011205113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105556005602555 + 105556005602556.

It is an arithmetic number, because the mean of its divisors is an integer number (105556005602556).

Almost surely, 2^{211112011205111} is an apocalyptic number.

211112011205111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211112011205111 is an equidigital number, since it uses as much as digits as its factorization.

211112011205111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 20.

Adding to 211112011205111 its reverse (111502110211112), we get a palindrome (322614121416223).

The spelling of 211112011205111 in words is "two hundred eleven trillion, one hundred twelve billion, eleven million, two hundred five thousand, one hundred eleven".