231011212 has 12 divisors (see below), whose sum is σ = 404422480. Its totient is φ = 115461936.

The previous prime is 231011203. The next prime is 231011219. The reversal of 231011212 is 212110132.

231011212 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 231011192 and 231011201.

It is not an unprimeable number, because it can be changed into a prime (231011219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2938 + ... + 21694.

Almost surely, 2^231011212 is an apocalyptic number.

It is an amenable number.

231011212 is a deficient number, since it is larger than the sum of its proper divisors (173411268).

231011212 is a wasteful number, since it uses less digits than its factorization.

231011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21840 (or 21838 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 231011212 is about 15199.0529968153. The cubic root of 231011212 is about 613.5891708626.

Adding to 231011212 its reverse (212110132), we get a palindrome (443121344).

The spelling of 231011212 in words is "two hundred thirty-one million, eleven thousand, two hundred twelve".