211010111111 has 8 divisors (see below), whose sum is σ = 222204507360. Its totient is φ = 199984051872.

The previous prime is 211010111027. The next prime is 211010111153. The reversal of 211010111111 is 111111010112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211010111111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211010111092 and 211010111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211010111171) 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 7 ways as a sum of consecutive naturals, for example, 42081680 + ... + 42086693.

It is an arithmetic number, because the mean of its divisors is an integer number (27775563420).

Almost surely, 2^211010111111 is an apocalyptic number.

211010111111 is a deficient number, since it is larger than the sum of its proper divisors (11194396249).

211010111111 is a wasteful number, since it uses less digits than its factorization.

211010111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84168505.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 211010111111 its reverse (111111010112), we get a palindrome (322121121223).

It can be divided in two parts, 2110101 and 11111, that added together give a palindrome (2121212).

The spelling of 211010111111 in words is "two hundred eleven billion, ten million, one hundred eleven thousand, one hundred eleven".