442130721161 has 2 divisors, whose sum is σ = 442130721162. Its totient is φ = 442130721160.

The previous prime is 442130721121. The next prime is 442130721203. The reversal of 442130721161 is 161127031244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 436260250000 + 5870471161 = 660500^2 + 76619^2 .

It is a cyclic number.

It is not a de Polignac number, because 442130721161 - 2¹⁰ = 442130720137 is a prime.

It is not a weakly prime, because it can be changed into another prime (442130721101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221065360580 + 221065360581.

It is an arithmetic number, because the mean of its divisors is an integer number (221065360581).

Almost surely, 2^442130721161 is an apocalyptic number.

It is an amenable number.

442130721161 is a deficient number, since it is larger than the sum of its proper divisors (1).

442130721161 is an equidigital number, since it uses as much as digits as its factorization.

442130721161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The spelling of 442130721161 in words is "four hundred forty-two billion, one hundred thirty million, seven hundred twenty-one thousand, one hundred sixty-one".