231213030331212 has 72 divisors (see below), whose sum is σ = 598637160139200. Its totient is φ = 75219651766368.

The previous prime is 231213030331181. The next prime is 231213030331229. The reversal of 231213030331212 is 212133030312132.

231213030331212 is a `hidden beast` number, since 2 + 3 + 1 + 2 + 1 + 30 + 303 + 312 + 12 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 391277998 + ... + 391868469.

Almost surely, 2^{231213030331212} is an apocalyptic number.

It is an amenable number.

231213030331212 is an abundant number, since it is smaller than the sum of its proper divisors (367424129807988).

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

231213030331212 is a wasteful number, since it uses less digits than its factorization.

231213030331212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783146675 (or 783146670 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 231213030331212 its reverse (212133030312132), we get a palindrome (443346060643344).

The spelling of 231213030331212 in words is "two hundred thirty-one trillion, two hundred thirteen billion, thirty million, three hundred thirty-one thousand, two hundred twelve".