211423043111 has 4 divisors (see below), whose sum is σ = 241626334992. Its totient is φ = 181219751232.

The previous prime is 211423043107. The next prime is 211423043119. The reversal of 211423043111 is 111340324112.

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 211423043111 - 2² = 211423043107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211423043119) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15101645930 + ... + 15101645943.

It is an arithmetic number, because the mean of its divisors is an integer number (60406583748).

Almost surely, 2^211423043111 is an apocalyptic number.

211423043111 is a deficient number, since it is larger than the sum of its proper divisors (30203291881).

211423043111 is an equidigital number, since it uses as much as digits as its factorization.

211423043111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30203291880.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211423043111 its reverse (111340324112), we get a palindrome (322763367223).

The spelling of 211423043111 in words is "two hundred eleven billion, four hundred twenty-three million, forty-three thousand, one hundred eleven".