231331121112 has 96 divisors (see below), whose sum is σ = 724498614000. Its totient is φ = 61010401536.

The previous prime is 231331121111. The next prime is 231331121141. The reversal of 231331121112 is 211121133132.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231331121111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7550487 + ... + 7581062.

Almost surely, 2^231331121112 is an apocalyptic number.

It is an amenable number.

231331121112 is an abundant number, since it is smaller than the sum of its proper divisors (493167492888).

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

231331121112 is a wasteful number, since it uses less digits than its factorization.

231331121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15131585 (or 15131574 counting only the distinct ones).

The product of its digits is 216, while the sum is 21.

Adding to 231331121112 its reverse (211121133132), we get a palindrome (442452254244).

The spelling of 231331121112 in words is "two hundred thirty-one billion, three hundred thirty-one million, one hundred twenty-one thousand, one hundred twelve".