211103021111 has 4 divisors (see below), whose sum is σ = 213994843392. Its totient is φ = 208211198832.

The previous prime is 211103021081. The next prime is 211103021131. The reversal of 211103021111 is 111120301112.

211103021111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 211103021111 - 2⁶ = 211103021047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211103021131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445911031 + ... + 1445911176.

It is an arithmetic number, because the mean of its divisors is an integer number (53498710848).

Almost surely, 2^211103021111 is an apocalyptic number.

211103021111 is a deficient number, since it is larger than the sum of its proper divisors (2891822281).

211103021111 is an equidigital number, since it uses as much as digits as its factorization.

211103021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2891822280.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 211103021111 its reverse (111120301112), we get a palindrome (322223322223).

The spelling of 211103021111 in words is "two hundred eleven billion, one hundred three million, twenty-one thousand, one hundred eleven".