211913648911 has 4 divisors (see below), whose sum is σ = 212481782392. Its totient is φ = 211345515432.

The previous prime is 211913648851. The next prime is 211913648939. The reversal of 211913648911 is 119846319112.

211913648911 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 211913648911 - 2¹⁵ = 211913616143 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 (211913649911) 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, 284066181 + ... + 284066926.

It is an arithmetic number, because the mean of its divisors is an integer number (53120445598).

Almost surely, 2^211913648911 is an apocalyptic number.

211913648911 is a deficient number, since it is larger than the sum of its proper divisors (568133481).

211913648911 is an equidigital number, since it uses as much as digits as its factorization.

211913648911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568133480.

The product of its digits is 93312, while the sum is 46.

The spelling of 211913648911 in words is "two hundred eleven billion, nine hundred thirteen million, six hundred forty-eight thousand, nine hundred eleven".