212112242 has 8 divisors (see below), whose sum is σ = 319343232. Its totient is φ = 105664500.

The previous prime is 212112223. The next prime is 212112253. The reversal of 212112242 is 242211212.

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

It is a self number, because there is not a number n which added to its sum of digits gives 212112242.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 195134 + ... + 196217.

It is an arithmetic number, because the mean of its divisors is an integer number (39917904).

Almost surely, 2^212112242 is an apocalyptic number.

212112242 is a deficient number, since it is larger than the sum of its proper divisors (107230990).

212112242 is a wasteful number, since it uses less digits than its factorization.

212112242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391624.

The product of its digits is 128, while the sum is 17.

The square root of 212112242 is about 14564.0736746283. The cubic root of 212112242 is about 596.3784081772.

Adding to 212112242 its reverse (242211212), we get a palindrome (454323454).

The spelling of 212112242 in words is "two hundred twelve million, one hundred twelve thousand, two hundred forty-two".