231120212 has 12 divisors (see below), whose sum is σ = 404781300. Its totient is φ = 115468416.

The previous prime is 231120209. The next prime is 231120217. The reversal of 231120212 is 212021132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 152868496 + 78251716 = 12364^2 + 8846^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231120217) 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, 17087 + ... + 27462.

It is an arithmetic number, because the mean of its divisors is an integer number (33731775).

Almost surely, 2^231120212 is an apocalyptic number.

It is an amenable number.

231120212 is a deficient number, since it is larger than the sum of its proper divisors (173661088).

231120212 is a wasteful number, since it uses less digits than its factorization.

231120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45850 (or 45848 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 231120212 is about 15202.6383236595. The cubic root of 231120212 is about 613.6856607007.

Adding to 231120212 its reverse (212021132), we get a palindrome (443141344).

The spelling of 231120212 in words is "two hundred thirty-one million, one hundred twenty thousand, two hundred twelve".