242566919129 has 2 divisors, whose sum is σ = 242566919130. Its totient is φ = 242566919128.

The previous prime is 242566919093. The next prime is 242566919213. The reversal of 242566919129 is 921919665242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230073715600 + 12493203529 = 479660^2 + 111773^2 .

It is a cyclic number.

It is not a de Polignac number, because 242566919129 - 2²⁰ = 242565870553 is a prime.

It is a super-2 number, since 2×242566919129² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242566919429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121283459564 + 121283459565.

It is an arithmetic number, because the mean of its divisors is an integer number (121283459565).

Almost surely, 2^242566919129 is an apocalyptic number.

It is an amenable number.

242566919129 is a deficient number, since it is larger than the sum of its proper divisors (1).

242566919129 is an equidigital number, since it uses as much as digits as its factorization.

242566919129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4199040, while the sum is 56.

The spelling of 242566919129 in words is "two hundred forty-two billion, five hundred sixty-six million, nine hundred nineteen thousand, one hundred twenty-nine".