213120242 has 8 divisors (see below), whose sum is σ = 319747932. Its totient is φ = 106537600.

The previous prime is 213120241. The next prime is 213120247. The reversal of 213120242 is 242021312.

It can be written as a sum of positive squares in 2 ways, for example, as 202236841 + 10883401 = 14221^2 + 3299^2 .

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 213120242.

It is not an unprimeable number, because it can be changed into a prime (213120241) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 5642 + ... + 21402.

Almost surely, 2^213120242 is an apocalyptic number.

213120242 is a deficient number, since it is larger than the sum of its proper divisors (106627690).

213120242 is a wasteful number, since it uses less digits than its factorization.

213120242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22524.

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

The square root of 213120242 is about 14598.6383611623. The cubic root of 213120242 is about 597.3216189901.

Adding to 213120242 its reverse (242021312), we get a palindrome (455141554).

The spelling of 213120242 in words is "two hundred thirteen million, one hundred twenty thousand, two hundred forty-two".