2001231230112 has 72 divisors (see below), whose sum is σ = 5691429443700. Its totient is φ = 667026892800.

The previous prime is 2001231230059. The next prime is 2001231230129. The reversal of 2001231230112 is 2110321321002.

2001231230112 is a `hidden beast` number, since 200 + 1 + 231 + 230 + 1 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1343828103696 + 657403126416 = 1159236^2 + 810804^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3676362 + ... + 4185462.

Almost surely, 2^{2001231230112} is an apocalyptic number.

It is an amenable number.

2001231230112 is an abundant number, since it is smaller than the sum of its proper divisors (3690198213588).

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

2001231230112 is a wasteful number, since it uses less digits than its factorization.

2001231230112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522766 (or 522755 counting only the distinct ones).

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

Adding to 2001231230112 its reverse (2110321321002), we get a palindrome (4111552551114).

The spelling of 2001231230112 in words is "two trillion, one billion, two hundred thirty-one million, two hundred thirty thousand, one hundred twelve".