231020212 has 12 divisors (see below), whose sum is σ = 404601120. Its totient is φ = 115419896.

The previous prime is 231020197. The next prime is 231020233. The reversal of 231020212 is 212020132.

231020212 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 = 231020192 and 231020201.

It is a congruent number.

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, 16618 + ... + 27169.

It is an arithmetic number, because the mean of its divisors is an integer number (33716760).

Almost surely, 2^231020212 is an apocalyptic number.

It is an amenable number.

231020212 is a deficient number, since it is larger than the sum of its proper divisors (173580908).

231020212 is a wasteful number, since it uses less digits than its factorization.

231020212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45110 (or 45108 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 231020212 is about 15199.3490650093. The cubic root of 231020212 is about 613.5971390629.

Adding to 231020212 its reverse (212020132), we get a palindrome (443040344).

It can be divided in two parts, 2310 and 20212, that added together give a palindrome (22522).

The spelling of 231020212 in words is "two hundred thirty-one million, twenty thousand, two hundred twelve".