212012231 has 8 divisors (see below), whose sum is σ = 219095184. Its totient is φ = 205027200.

The previous prime is 212012209. The next prime is 212012263. The reversal of 212012231 is 132210212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212012231 - 2¹⁰ = 212011207 is a prime.

It is a super-2 number, since 2×212012231² = 89898372187194722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20066 + ... + 28751.

It is an arithmetic number, because the mean of its divisors is an integer number (27386898).

Almost surely, 2^212012231 is an apocalyptic number.

212012231 is a deficient number, since it is larger than the sum of its proper divisors (7082953).

212012231 is a wasteful number, since it uses less digits than its factorization.

212012231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48961.

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

The square root of 212012231 is about 14560.6397867676. The cubic root of 212012231 is about 596.2846625624.

Adding to 212012231 its reverse (132210212), we get a palindrome (344222443).

It can be divided in two parts, 21201 and 2231, that added together give a palindrome (23432).

The spelling of 212012231 in words is "two hundred twelve million, twelve thousand, two hundred thirty-one".