168004017122 has 18 divisors (see below), whose sum is σ = 254434906593. Its totient is φ = 83200046184.

The previous prime is 168004017121. The next prime is 168004017133. The reversal of 168004017122 is 221710400861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 161209477081 + 6794540041 = 401509^2 + 82429^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=289831.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168004017121) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 63181829 + ... + 63184487.

Almost surely, 2^168004017122 is an apocalyptic number.

168004017122 is a deficient number, since it is larger than the sum of its proper divisors (86430889471).

168004017122 is an frugal number, since it uses more digits than its factorization.

168004017122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538 (or 2770 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

Multiplying 168004017122 by its sum of digits (32), we get a square (5376128547904 = 2318648²).

Adding to 168004017122 its reverse (221710400861), we get a palindrome (389714417983).

The spelling of 168004017122 in words is "one hundred sixty-eight billion, four million, seventeen thousand, one hundred twenty-two".