231003212112 has 120 divisors (see below), whose sum is σ = 657567091584. Its totient is φ = 75686510592.

The previous prime is 231003212081. The next prime is 231003212113. The reversal of 231003212112 is 211212300132.

231003212112 is a `hidden beast` number, since 2 + 310 + 0 + 321 + 21 + 12 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231003212113) 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, 4441168 + ... + 4492880.

Almost surely, 2^231003212112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231003212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328783545792).

231003212112 is an abundant number, since it is smaller than the sum of its proper divisors (426563879472).

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

231003212112 is a wasteful number, since it uses less digits than its factorization.

231003212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52257 (or 52248 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 231003212112 its reverse (211212300132), we get a palindrome (442215512244).

The spelling of 231003212112 in words is "two hundred thirty-one billion, three million, two hundred twelve thousand, one hundred twelve".