42804570121 has 2 divisors, whose sum is σ = 42804570122. Its totient is φ = 42804570120.

The previous prime is 42804570089. The next prime is 42804570131. The reversal of 42804570121 is 12107540824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42236415225 + 568154896 = 205515^2 + 23836^2 .

It is a cyclic number.

It is not a de Polignac number, because 42804570121 - 2⁵ = 42804570089 is a prime.

It is not a weakly prime, because it can be changed into another prime (42804570131) 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, 21402285060 + 21402285061.

It is an arithmetic number, because the mean of its divisors is an integer number (21402285061).

Almost surely, 2^42804570121 is an apocalyptic number.

It is an amenable number.

42804570121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42804570121 is an equidigital number, since it uses as much as digits as its factorization.

42804570121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 34.

The spelling of 42804570121 in words is "forty-two billion, eight hundred four million, five hundred seventy thousand, one hundred twenty-one".