242721189467191 has 2 divisors, whose sum is σ = 242721189467192. Its totient is φ = 242721189467190.

The previous prime is 242721189467137. The next prime is 242721189467203. The reversal of 242721189467191 is 191764981127242.

242721189467191 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 is a cyclic number.

It is not a de Polignac number, because 242721189467191 - 2²⁵ = 242721155912759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242721187467191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121360594733595 + 121360594733596.

It is an arithmetic number, because the mean of its divisors is an integer number (121360594733596).

Almost surely, 2^{242721189467191} is an apocalyptic number.

242721189467191 is a deficient number, since it is larger than the sum of its proper divisors (1).

242721189467191 is an equidigital number, since it uses as much as digits as its factorization.

242721189467191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24385536, while the sum is 64.

The spelling of 242721189467191 in words is "two hundred forty-two trillion, seven hundred twenty-one billion, one hundred eighty-nine million, four hundred sixty-seven thousand, one hundred ninety-one".