211833934821 has 6 divisors (see below), whose sum is σ = 305982350310. Its totient is φ = 141222623208.

The previous prime is 211833934801. The next prime is 211833934867. The reversal of 211833934821 is 128439338112.

It is a happy number.

211833934821 is a `hidden beast` number, since 2 + 1 + 1 + 83 + 3 + 93 + 482 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 124389530721 + 87444404100 = 352689^2 + 295710^2 .

It is not a de Polignac number, because 211833934821 - 2⁹ = 211833934309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211833934801) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11768551926 + ... + 11768551943.

It is an arithmetic number, because the mean of its divisors is an integer number (50997058385).

Almost surely, 2^211833934821 is an apocalyptic number.

It is an amenable number.

211833934821 is a deficient number, since it is larger than the sum of its proper divisors (94148415489).

211833934821 is a wasteful number, since it uses less digits than its factorization.

211833934821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23537103875 (or 23537103872 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 211833934821 in words is "two hundred eleven billion, eight hundred thirty-three million, nine hundred thirty-four thousand, eight hundred twenty-one".