211123133111 has 8 divisors (see below), whose sum is σ = 240329890944. Its totient is φ = 183585332920.

The previous prime is 211123133101. The next prime is 211123133149. The reversal of 211123133111 is 111331321112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-211123133111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211123133101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417239141 + ... + 417239646.

It is an arithmetic number, because the mean of its divisors is an integer number (30041236368).

Almost surely, 2^211123133111 is an apocalyptic number.

211123133111 is a deficient number, since it is larger than the sum of its proper divisors (29206757833).

211123133111 is a wasteful number, since it uses less digits than its factorization.

211123133111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834478821.

The product of its digits is 108, while the sum is 20.

Adding to 211123133111 its reverse (111331321112), we get a palindrome (322454454223).

The spelling of 211123133111 in words is "two hundred eleven billion, one hundred twenty-three million, one hundred thirty-three thousand, one hundred eleven".