242120544409 has 2 divisors, whose sum is σ = 242120544410. Its totient is φ = 242120544408.

The previous prime is 242120544383. The next prime is 242120544437. The reversal of 242120544409 is 904445021242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160897254400 + 81223290009 = 401120^2 + 284997^2 .

It is a cyclic number.

It is not a de Polignac number, because 242120544409 - 2⁵ = 242120544377 is a prime.

It is not a weakly prime, because it can be changed into another prime (242120544499) 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, 121060272204 + 121060272205.

It is an arithmetic number, because the mean of its divisors is an integer number (121060272205).

Almost surely, 2^242120544409 is an apocalyptic number.

It is an amenable number.

242120544409 is a deficient number, since it is larger than the sum of its proper divisors (1).

242120544409 is an equidigital number, since it uses as much as digits as its factorization.

242120544409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 242120544409 in words is "two hundred forty-two billion, one hundred twenty million, five hundred forty-four thousand, four hundred nine".