211122012109111 has 2 divisors, whose sum is σ = 211122012109112. Its totient is φ = 211122012109110.

The previous prime is 211122012109109. The next prime is 211122012109153. The reversal of 211122012109111 is 111901210221112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211122012109111 - 2¹ = 211122012109109 is a prime.

It is a super-2 number, since 2×211122012109111² (a number of 29 digits) contains 22 as substring.

Together with 211122012109109, 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 (211122012119111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105561006054555 + 105561006054556.

It is an arithmetic number, because the mean of its divisors is an integer number (105561006054556).

Almost surely, 2^{211122012109111} is an apocalyptic number.

211122012109111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211122012109111 is an equidigital number, since it uses as much as digits as its factorization.

211122012109111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 25.

The spelling of 211122012109111 in words is "two hundred eleven trillion, one hundred twenty-two billion, twelve million, one hundred nine thousand, one hundred eleven".