242505202121 has 16 divisors (see below), whose sum is σ = 308759942400. Its totient is φ = 185255961408.

The previous prime is 242505202073. The next prime is 242505202139. The reversal of 242505202121 is 121202505242.

It is not a de Polignac number, because 242505202121 - 2¹⁸ = 242504939977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (242505202151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45943781 + ... + 45949058.

It is an arithmetic number, because the mean of its divisors is an integer number (19297496400).

Almost surely, 2^242505202121 is an apocalyptic number.

It is an amenable number.

242505202121 is a deficient number, since it is larger than the sum of its proper divisors (66254740279).

242505202121 is a wasteful number, since it uses less digits than its factorization.

242505202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91892888.

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 242505202121 its reverse (121202505242), we get a palindrome (363707707363).

The spelling of 242505202121 in words is "two hundred forty-two billion, five hundred five million, two hundred two thousand, one hundred twenty-one".