211103011111 has 4 divisors (see below), whose sum is σ = 223520835312. Its totient is φ = 198685186912.

The previous prime is 211103011099. The next prime is 211103011151. The reversal of 211103011111 is 111110301112.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 211103011111 - 2¹¹ = 211103009063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211103011091 and 211103011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211103011151) 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 in 3 ways as a sum of consecutive naturals, for example, 6208912075 + ... + 6208912108.

It is an arithmetic number, because the mean of its divisors is an integer number (55880208828).

Almost surely, 2^211103011111 is an apocalyptic number.

211103011111 is a deficient number, since it is larger than the sum of its proper divisors (12417824201).

211103011111 is a wasteful number, since it uses less digits than its factorization.

211103011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12417824200.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 211103011111 its reverse (111110301112), we get a palindrome (322213312223).

It can be divided in two parts, 21110301111 and 1, that added together give a palindrome (21110301112).

The spelling of 211103011111 in words is "two hundred eleven billion, one hundred three million, eleven thousand, one hundred eleven".