242120455081 has 2 divisors, whose sum is σ = 242120455082. Its totient is φ = 242120455080.

The previous prime is 242120455079. The next prime is 242120455103. The reversal of 242120455081 is 180554021242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233487072025 + 8633383056 = 483205^2 + 92916^2 .

It is a cyclic number.

It is not a de Polignac number, because 242120455081 - 2¹ = 242120455079 is a prime.

It is a super-2 number, since 2×242120455081² (a number of 24 digits) contains 22 as substring.

Together with 242120455079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (242120452081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121060227540 + 121060227541.

It is an arithmetic number, because the mean of its divisors is an integer number (121060227541).

Almost surely, 2^242120455081 is an apocalyptic number.

It is an amenable number.

242120455081 is a deficient number, since it is larger than the sum of its proper divisors (1).

242120455081 is an equidigital number, since it uses as much as digits as its factorization.

242120455081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25600, while the sum is 34.

The spelling of 242120455081 in words is "two hundred forty-two billion, one hundred twenty million, four hundred fifty-five thousand, eighty-one".