242120545393 has 2 divisors, whose sum is σ = 242120545394. Its totient is φ = 242120545392.

The previous prime is 242120545379. The next prime is 242120545427. The reversal of 242120545393 is 393545021242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122008394209 + 120112151184 = 349297^2 + 346572^2 .

It is a cyclic number.

It is not a de Polignac number, because 242120545393 - 2³⁷ = 104681591921 is a prime.

It is not a weakly prime, because it can be changed into another prime (242120543393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121060272696 + 121060272697.

It is an arithmetic number, because the mean of its divisors is an integer number (121060272697).

Almost surely, 2^242120545393 is an apocalyptic number.

It is an amenable number.

242120545393 is a deficient number, since it is larger than the sum of its proper divisors (1).

242120545393 is an equidigital number, since it uses as much as digits as its factorization.

242120545393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 242120545393 in words is "two hundred forty-two billion, one hundred twenty million, five hundred forty-five thousand, three hundred ninety-three".