242454253135021 has 2 divisors, whose sum is σ = 242454253135022. Its totient is φ = 242454253135020.

The previous prime is 242454253134953. The next prime is 242454253135033. The reversal of 242454253135021 is 120531352454242.

242454253135021 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., 190401058390921 + 52053194744100 = 13798589^2 + 7214790^2 .

It is a cyclic number.

It is not a de Polignac number, because 242454253135021 - 2³⁹ = 241904497321133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242454253135421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121227126567510 + 121227126567511.

It is an arithmetic number, because the mean of its divisors is an integer number (121227126567511).

Almost surely, 2^{242454253135021} is an apocalyptic number.

It is an amenable number.

242454253135021 is a deficient number, since it is larger than the sum of its proper divisors (1).

242454253135021 is an equidigital number, since it uses as much as digits as its factorization.

242454253135021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 242454253135021 in words is "two hundred forty-two trillion, four hundred fifty-four billion, two hundred fifty-three million, one hundred thirty-five thousand, twenty-one".