242430130021 has 2 divisors, whose sum is σ = 242430130022. Its totient is φ = 242430130020.

The previous prime is 242430130003. The next prime is 242430130037. The reversal of 242430130021 is 120031034242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 235138677921 + 7291452100 = 484911^2 + 85390^2 .

It is a cyclic number.

It is not a de Polignac number, because 242430130021 - 2³⁵ = 208070391653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 242430129974 and 242430130001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242430130001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121215065010 + 121215065011.

It is an arithmetic number, because the mean of its divisors is an integer number (121215065011).

Almost surely, 2^242430130021 is an apocalyptic number.

It is an amenable number.

242430130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

242430130021 is an equidigital number, since it uses as much as digits as its factorization.

242430130021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 242430130021 its reverse (120031034242), we get a palindrome (362461164263).

The spelling of 242430130021 in words is "two hundred forty-two billion, four hundred thirty million, one hundred thirty thousand, twenty-one".