211683909923 has 4 divisors (see below), whose sum is σ = 222825168360. Its totient is φ = 200542651488.

The previous prime is 211683909887. The next prime is 211683909929. The reversal of 211683909923 is 329909386112.

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 211683909923 - 2²⁴ = 211667132707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211683909929) 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, 5570629190 + ... + 5570629227.

It is an arithmetic number, because the mean of its divisors is an integer number (55706292090).

Almost surely, 2^211683909923 is an apocalyptic number.

211683909923 is a deficient number, since it is larger than the sum of its proper divisors (11141258437).

211683909923 is a wasteful number, since it uses less digits than its factorization.

211683909923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11141258436.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The spelling of 211683909923 in words is "two hundred eleven billion, six hundred eighty-three million, nine hundred nine thousand, nine hundred twenty-three".