231330020012 has 96 divisors (see below), whose sum is σ = 533486943360. Its totient is φ = 85163950080.

The previous prime is 231330019997. The next prime is 231330020021. The reversal of 231330020012 is 210020033132.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 340712 + ... + 760752.

It is an arithmetic number, because the mean of its divisors is an integer number (5557155660).

Almost surely, 2^231330020012 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 231330020012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266743471680).

231330020012 is an abundant number, since it is smaller than the sum of its proper divisors (302156923348).

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

231330020012 is a wasteful number, since it uses less digits than its factorization.

231330020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420171 (or 420169 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 231330020012 its reverse (210020033132), we get a palindrome (441350053144).

The spelling of 231330020012 in words is "two hundred thirty-one billion, three hundred thirty million, twenty thousand, twelve".