212130242 has 16 divisors (see below), whose sum is σ = 333184320. Its totient is φ = 101100912.

The previous prime is 212130229. The next prime is 212130271. The reversal of 212130242 is 242031212.

It is a self number, because there is not a number n which added to its sum of digits gives 212130242.

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 7 ways as a sum of consecutive naturals, for example, 5609 + ... + 21347.

It is an arithmetic number, because the mean of its divisors is an integer number (20824020).

Almost surely, 2^212130242 is an apocalyptic number.

212130242 is a deficient number, since it is larger than the sum of its proper divisors (121054078).

212130242 is a wasteful number, since it uses less digits than its factorization.

212130242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16057.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 212130242 is about 14564.6916204910. The cubic root of 212130242 is about 596.3952774026.

Adding to 212130242 its reverse (242031212), we get a palindrome (454161454).

The spelling of 212130242 in words is "two hundred twelve million, one hundred thirty thousand, two hundred forty-two".