211123323231 has 16 divisors (see below), whose sum is σ = 291185731200. Its totient is φ = 135959633568.

The previous prime is 211123323223. The next prime is 211123323253. The reversal of 211123323231 is 132323321112.

It is not a de Polignac number, because 211123323231 - 2³ = 211123323223 is a prime.

It is a super-2 number, since 2×211123323231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211123313231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6826341 + ... + 6857198.

It is an arithmetic number, because the mean of its divisors is an integer number (18199108200).

Almost surely, 2^211123323231 is an apocalyptic number.

211123323231 is a deficient number, since it is larger than the sum of its proper divisors (80062407969).

211123323231 is a wasteful number, since it uses less digits than its factorization.

211123323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13683718.

The product of its digits is 1296, while the sum is 24.

Adding to 211123323231 its reverse (132323321112), we get a palindrome (343446644343).

The spelling of 211123323231 in words is "two hundred eleven billion, one hundred twenty-three million, three hundred twenty-three thousand, two hundred thirty-one".