243121222 has 8 divisors (see below), whose sum is σ = 365191200. Its totient is φ = 121390824.

The previous prime is 243121213. The next prime is 243121223. The reversal of 243121222 is 222121342.

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 243121222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121223) 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, 83097 + ... + 85972.

It is an arithmetic number, because the mean of its divisors is an integer number (45648900).

Almost surely, 2^243121222 is an apocalyptic number.

243121222 is a deficient number, since it is larger than the sum of its proper divisors (122069978).

243121222 is a wasteful number, since it uses less digits than its factorization.

243121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169790.

The product of its digits is 384, while the sum is 19.

The square root of 243121222 is about 15592.3449807911. The cubic root of 243121222 is about 624.1288958883.

Adding to 243121222 its reverse (222121342), we get a palindrome (465242564).

It can be divided in two parts, 2431 and 21222, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 243121222 in words is "two hundred forty-three million, one hundred twenty-one thousand, two hundred twenty-two".