211355893711 has 4 divisors (see below), whose sum is σ = 213448526424. Its totient is φ = 209263261000.

The previous prime is 211355893699. The next prime is 211355893717. The reversal of 211355893711 is 117398553112.

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 211355893711 - 2²⁵ = 211322339279 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 (211355893717) 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, 1046316205 + ... + 1046316406.

It is an arithmetic number, because the mean of its divisors is an integer number (53362131606).

Almost surely, 2^211355893711 is an apocalyptic number.

211355893711 is a deficient number, since it is larger than the sum of its proper divisors (2092632713).

211355893711 is a wasteful number, since it uses less digits than its factorization.

211355893711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092632712.

The product of its digits is 226800, while the sum is 46.

The spelling of 211355893711 in words is "two hundred eleven billion, three hundred fifty-five million, eight hundred ninety-three thousand, seven hundred eleven".