231133032111 has 4 divisors (see below), whose sum is σ = 308177376152. Its totient is φ = 154088688072.

The previous prime is 231133032059. The next prime is 231133032133. The reversal of 231133032111 is 111230331132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 231133032111 - 2²¹ = 231130934959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231133030111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38522172016 + ... + 38522172021.

It is an arithmetic number, because the mean of its divisors is an integer number (77044344038).

Almost surely, 2^231133032111 is an apocalyptic number.

231133032111 is a deficient number, since it is larger than the sum of its proper divisors (77044344041).

231133032111 is an equidigital number, since it uses as much as digits as its factorization.

231133032111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77044344040.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 231133032111 its reverse (111230331132), we get a palindrome (342363363243).

The spelling of 231133032111 in words is "two hundred thirty-one billion, one hundred thirty-three million, thirty-two thousand, one hundred eleven".