212304242242 has 4 divisors (see below), whose sum is σ = 318456363366. Its totient is φ = 106152121120.

The previous prime is 212304242197. The next prime is 212304242257. The reversal of 212304242242 is 242242403212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 206587521361 + 5716720881 = 454519^2 + 75609^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 212304242242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53076060559 + ... + 53076060562.

Almost surely, 2^212304242242 is an apocalyptic number.

212304242242 is a deficient number, since it is larger than the sum of its proper divisors (106152121124).

212304242242 is a wasteful number, since it uses less digits than its factorization.

212304242242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106152121123.

The product of its (nonzero) digits is 12288, while the sum is 28.

Adding to 212304242242 its reverse (242242403212), we get a palindrome (454546645454).

The spelling of 212304242242 in words is "two hundred twelve billion, three hundred four million, two hundred forty-two thousand, two hundred forty-two".