42120055073 has 2 divisors, whose sum is σ = 42120055074. Its totient is φ = 42120055072.

The previous prime is 42120055067. The next prime is 42120055129. The reversal of 42120055073 is 37055002124.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30519041809 + 11601013264 = 174697^2 + 107708^2 .

It is a cyclic number.

It is not a de Polignac number, because 42120055073 - 2¹² = 42120050977 is a prime.

It is a super-3 number, since 3×42120055073³ (a number of 33 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (42120055673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21060027536 + 21060027537.

It is an arithmetic number, because the mean of its divisors is an integer number (21060027537).

Almost surely, 2^42120055073 is an apocalyptic number.

It is an amenable number.

42120055073 is a deficient number, since it is larger than the sum of its proper divisors (1).

42120055073 is an equidigital number, since it uses as much as digits as its factorization.

42120055073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 29.

Adding to 42120055073 its reverse (37055002124), we get a palindrome (79175057197).

The spelling of 42120055073 in words is "forty-two billion, one hundred twenty million, fifty-five thousand, seventy-three".