231112120211 has 4 divisors (see below), whose sum is σ = 264128137392. Its totient is φ = 198096103032.

The previous prime is 231112120201. The next prime is 231112120247. The reversal of 231112120211 is 112021211132.

It is a happy number.

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 231112120211 - 2¹⁰ = 231112119187 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231112120211.

It is not an unprimeable number, because it can be changed into a prime (231112120201) 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 3 ways as a sum of consecutive naturals, for example, 16508008580 + ... + 16508008593.

It is an arithmetic number, because the mean of its divisors is an integer number (66032034348).

Almost surely, 2^231112120211 is an apocalyptic number.

231112120211 is a deficient number, since it is larger than the sum of its proper divisors (33016017181).

231112120211 is an equidigital number, since it uses as much as digits as its factorization.

231112120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33016017180.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 231112120211 its reverse (112021211132), we get a palindrome (343133331343).

It can be divided in two parts, 2311121 and 20211, that added together give a palindrome (2331332).

The spelling of 231112120211 in words is "two hundred thirty-one billion, one hundred twelve million, one hundred twenty thousand, two hundred eleven".