231111111132 has 36 divisors (see below), whose sum is σ = 637306398456. Its totient is φ = 70033669920.

The previous prime is 231111111103. The next prime is 231111111181.

231111111132 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits and also a Zuckerman number because it is divisible by the product of its digits.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 291806563 + ... + 291807354.

Almost surely, 2^231111111132 is an apocalyptic number.

231111111132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231111111132 is an abundant number, since it is smaller than the sum of its proper divisors (406195287324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231111111132 is a wasteful number, since it uses less digits than its factorization.

231111111132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583613938 (or 583613933 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

It can be divided in two parts, 231111 and 111132, that added together give a palindrome (342243).

The spelling of 231111111132 in words is "two hundred thirty-one billion, one hundred eleven million, one hundred eleven thousand, one hundred thirty-two".