231323203212 has 12 divisors (see below), whose sum is σ = 539754140856. Its totient is φ = 77107734400.

The previous prime is 231323203159. The next prime is 231323203229. The reversal of 231323203212 is 212302323132.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9638466789 + ... + 9638466812.

It is an arithmetic number, because the mean of its divisors is an integer number (44979511738).

Almost surely, 2^231323203212 is an apocalyptic number.

It is an amenable number.

231323203212 is an abundant number, since it is smaller than the sum of its proper divisors (308430937644).

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

231323203212 is a wasteful number, since it uses less digits than its factorization.

231323203212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19276933608 (or 19276933606 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 231323203212 its reverse (212302323132), we get a palindrome (443625526344).

The spelling of 231323203212 in words is "two hundred thirty-one billion, three hundred twenty-three million, two hundred three thousand, two hundred twelve".