231110133202987 has 4 divisors (see below), whose sum is σ = 231140634745896. Its totient is φ = 231079631660080.

The previous prime is 231110133202891. The next prime is 231110133202997. The reversal of 231110133202987 is 789202331011132.

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 231110133202987 - 2³⁵ = 231075773464619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231110133202997) 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, 15250760089 + ... + 15250775242.

It is an arithmetic number, because the mean of its divisors is an integer number (57785158686474).

Almost surely, 2^{231110133202987} is an apocalyptic number.

231110133202987 is a deficient number, since it is larger than the sum of its proper divisors (30501542909).

231110133202987 is an equidigital number, since it uses as much as digits as its factorization.

231110133202987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30501542908.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 231110133202987 in words is "two hundred thirty-one trillion, one hundred ten billion, one hundred thirty-three million, two hundred two thousand, nine hundred eighty-seven".