211123300111 has 2 divisors, whose sum is σ = 211123300112. Its totient is φ = 211123300110.

The previous prime is 211123300061. The next prime is 211123300159. The reversal of 211123300111 is 111003321112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211123300111 - 2¹⁷ = 211123169039 is a prime.

It is a super-2 number, since 2×211123300111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211123304111) 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, 105561650055 + 105561650056.

It is an arithmetic number, because the mean of its divisors is an integer number (105561650056).

Almost surely, 2^211123300111 is an apocalyptic number.

211123300111 is a deficient number, since it is larger than the sum of its proper divisors (1).

211123300111 is an equidigital number, since it uses as much as digits as its factorization.

211123300111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 211123300111 its reverse (111003321112), we get a palindrome (322126621223).

The spelling of 211123300111 in words is "two hundred eleven billion, one hundred twenty-three million, three hundred thousand, one hundred eleven".