242512220120257 has 2 divisors, whose sum is σ = 242512220120258. Its totient is φ = 242512220120256.

The previous prime is 242512220120231. The next prime is 242512220120279. The reversal of 242512220120257 is 752021022215242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128083180603456 + 114429039516801 = 11317384^2 + 10697151^2 .

It is a cyclic number.

It is not a de Polignac number, because 242512220120257 - 2¹⁹ = 242512219595969 is a prime.

It is not a weakly prime, because it can be changed into another prime (242512220120227) 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 as a sum of consecutive naturals, namely, 121256110060128 + 121256110060129.

It is an arithmetic number, because the mean of its divisors is an integer number (121256110060129).

Almost surely, 2^{242512220120257} is an apocalyptic number.

It is an amenable number.

242512220120257 is a deficient number, since it is larger than the sum of its proper divisors (1).

242512220120257 is an equidigital number, since it uses as much as digits as its factorization.

242512220120257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 89600, while the sum is 37.

Adding to 242512220120257 its reverse (752021022215242), we get a palindrome (994533242335499).

The spelling of 242512220120257 in words is "two hundred forty-two trillion, five hundred twelve billion, two hundred twenty million, one hundred twenty thousand, two hundred fifty-seven".