231101212 has 12 divisors (see below), whose sum is σ = 405921376. Its totient is φ = 115123680.

The previous prime is 231101207. The next prime is 231101219. The reversal of 231101212 is 212101132.

231101212 is digitally balanced in base 2, 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 = 231101192 and 231101201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231101219) 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, 105513 + ... + 107680.

Almost surely, 2^231101212 is an apocalyptic number.

It is an amenable number.

231101212 is a deficient number, since it is larger than the sum of its proper divisors (174820164).

231101212 is a wasteful number, since it uses less digits than its factorization.

231101212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213468 (or 213466 counting only the distinct ones).

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

The square root of 231101212 is about 15202.0134192810. The cubic root of 231101212 is about 613.6688435546.

Adding to 231101212 its reverse (212101132), we get a palindrome (443202344).

The spelling of 231101212 in words is "two hundred thirty-one million, one hundred one thousand, two hundred twelve".