231132011111 has 4 divisors (see below), whose sum is σ = 231417712800. Its totient is φ = 230846309424.

The previous prime is 231132011093. The next prime is 231132011113. The reversal of 231132011111 is 111110231132.

231132011111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 231132011111 - 2²⁶ = 231064902247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231132011111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231132011113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142849631 + ... + 142851248.

It is an arithmetic number, because the mean of its divisors is an integer number (57854428200).

Almost surely, 2^231132011111 is an apocalyptic number.

231132011111 is a deficient number, since it is larger than the sum of its proper divisors (285701689).

231132011111 is an equidigital number, since it uses as much as digits as its factorization.

231132011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285701688.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 231132011111 its reverse (111110231132), we get a palindrome (342242242243).

The spelling of 231132011111 in words is "two hundred thirty-one billion, one hundred thirty-two million, eleven thousand, one hundred eleven".