242130121 has 2 divisors, whose sum is σ = 242130122. Its totient is φ = 242130120.

The previous prime is 242130103. The next prime is 242130137. The reversal of 242130121 is 121031242.

It is an a-pointer prime, because the next prime (242130137) can be obtained adding 242130121 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230705721 + 11424400 = 15189^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 242130121 - 2⁵ = 242130089 is a prime.

It is a super-3 number, since 3×242130121³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 242130095 and 242130104.

It is not a weakly prime, because it can be changed into another prime (242136121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121065060 + 121065061.

It is an arithmetic number, because the mean of its divisors is an integer number (121065061).

Almost surely, 2^242130121 is an apocalyptic number.

It is an amenable number.

242130121 is a deficient number, since it is larger than the sum of its proper divisors (1).

242130121 is an equidigital number, since it uses as much as digits as its factorization.

242130121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 242130121 is about 15560.5308714067. The cubic root of 242130121 is about 623.2796388368.

Adding to 242130121 its reverse (121031242), we get a palindrome (363161363).

The spelling of 242130121 in words is "two hundred forty-two million, one hundred thirty thousand, one hundred twenty-one".