243420122242 has 16 divisors (see below), whose sum is σ = 398363480064. Its totient is φ = 110634498000.

The previous prime is 243420122221. The next prime is 243420122249. The reversal of 243420122242 is 242221024342.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 243420122242.

It is not an unprimeable number, because it can be changed into a prime (243420122249) 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 7 ways as a sum of consecutive naturals, for example, 322434 + ... + 768637.

It is an arithmetic number, because the mean of its divisors is an integer number (24897717504).

Almost surely, 2^243420122242 is an apocalyptic number.

243420122242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

243420122242 is a deficient number, since it is larger than the sum of its proper divisors (154943357822).

243420122242 is a wasteful number, since it uses less digits than its factorization.

243420122242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101225.

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

Adding to 243420122242 its reverse (242221024342), we get a palindrome (485641146584).

The spelling of 243420122242 in words is "two hundred forty-three billion, four hundred twenty million, one hundred twenty-two thousand, two hundred forty-two".