242121355 has 8 divisors (see below), whose sum is σ = 332052192. Its totient is φ = 166026048.

The previous prime is 242121353. The next prime is 242121401. The reversal of 242121355 is 553121242.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 242121355 - 2¹ = 242121353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242121353) 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, 3458842 + ... + 3458911.

It is an arithmetic number, because the mean of its divisors is an integer number (41506524).

Almost surely, 2^242121355 is an apocalyptic number.

242121355 is a deficient number, since it is larger than the sum of its proper divisors (89930837).

242121355 is an equidigital number, since it uses as much as digits as its factorization.

242121355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6917765.

The product of its digits is 2400, while the sum is 25.

The square root of 242121355 is about 15560.2491946627. The cubic root of 242121355 is about 623.2721170751.

Adding to 242121355 its reverse (553121242), we get a palindrome (795242597).

The spelling of 242121355 in words is "two hundred forty-two million, one hundred twenty-one thousand, three hundred fifty-five".