242120515081 has 2 divisors, whose sum is σ = 242120515082. Its totient is φ = 242120515080.

The previous prime is 242120515003. The next prime is 242120515099. The reversal of 242120515081 is 180515021242.

242120515081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189624540681 + 52495974400 = 435459^2 + 229120^2 .

It is a cyclic number.

It is not a de Polignac number, because 242120515081 - 2¹⁹ = 242119990793 is a prime.

It is a super-2 number, since 2×242120515081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242120515001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121060257540 + 121060257541.

It is an arithmetic number, because the mean of its divisors is an integer number (121060257541).

Almost surely, 2^242120515081 is an apocalyptic number.

It is an amenable number.

242120515081 is a deficient number, since it is larger than the sum of its proper divisors (1).

242120515081 is an equidigital number, since it uses as much as digits as its factorization.

242120515081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6400, while the sum is 31.

The spelling of 242120515081 in words is "two hundred forty-two billion, one hundred twenty million, five hundred fifteen thousand, eighty-one".