242120543393 has 2 divisors, whose sum is σ = 242120543394. Its totient is φ = 242120543392.

The previous prime is 242120543383. The next prime is 242120543437. The reversal of 242120543393 is 393345021242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240038263969 + 2082279424 = 489937^2 + 45632^2 .

It is a cyclic number.

It is not a de Polignac number, because 242120543393 - 2²⁰ = 242119494817 is a prime.

It is not a weakly prime, because it can be changed into another prime (242120543323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121060271696 + 121060271697.

It is an arithmetic number, because the mean of its divisors is an integer number (121060271697).

Almost surely, 2^242120543393 is an apocalyptic number.

It is an amenable number.

242120543393 is a deficient number, since it is larger than the sum of its proper divisors (1).

242120543393 is an equidigital number, since it uses as much as digits as its factorization.

242120543393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 242120543393 in words is "two hundred forty-two billion, one hundred twenty million, five hundred forty-three thousand, three hundred ninety-three".