242123210342305 has 4 divisors (see below), whose sum is σ = 290547852410772. Its totient is φ = 193698568273840.

The previous prime is 242123210342287. The next prime is 242123210342357. The reversal of 242123210342305 is 503243012321242.

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

It can be written as a sum of positive squares in 2 ways, for example, as 177000779738896 + 65122430603409 = 13304164^2 + 8069847^2 .

It is not a de Polignac number, because 242123210342305 - 2¹⁵ = 242123210309537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24212321034226 + ... + 24212321034235.

It is an arithmetic number, because the mean of its divisors is an integer number (72636963102693).

Almost surely, 2^{242123210342305} is an apocalyptic number.

It is an amenable number.

242123210342305 is a deficient number, since it is larger than the sum of its proper divisors (48424642068467).

242123210342305 is an equidigital number, since it uses as much as digits as its factorization.

242123210342305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48424642068466.

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 242123210342305 its reverse (503243012321242), we get a palindrome (745366222663547).

The spelling of 242123210342305 in words is "two hundred forty-two trillion, one hundred twenty-three billion, two hundred ten million, three hundred forty-two thousand, three hundred five".