211023123203 has 4 divisors (see below), whose sum is σ = 211033317168. Its totient is φ = 211012929240.

The previous prime is 211023123191. The next prime is 211023123217. The reversal of 211023123203 is 302321320112.

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 211023123203 - 2⁴ = 211023123187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211023123253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5065868 + ... + 5107353.

It is an arithmetic number, because the mean of its divisors is an integer number (52758329292).

Almost surely, 2^211023123203 is an apocalyptic number.

211023123203 is a deficient number, since it is larger than the sum of its proper divisors (10193965).

211023123203 is a wasteful number, since it uses less digits than its factorization.

211023123203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10193964.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 211023123203 its reverse (302321320112), we get a palindrome (513344443315).

The spelling of 211023123203 in words is "two hundred eleven billion, twenty-three million, one hundred twenty-three thousand, two hundred three".