123112116165 has 16 divisors (see below), whose sum is σ = 203771779200. Its totient is φ = 63395664192.

The previous prime is 123112116163. The next prime is 123112116209. The reversal of 123112116165 is 561611211321.

It is not a de Polignac number, because 123112116165 - 2¹ = 123112116163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123112116161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141507745 + ... + 141508614.

It is an arithmetic number, because the mean of its divisors is an integer number (12735736200).

Almost surely, 2^123112116165 is an apocalyptic number.

123112116165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123112116165 is a deficient number, since it is larger than the sum of its proper divisors (80659663035).

123112116165 is a wasteful number, since it uses less digits than its factorization.

123112116165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283016396.

The product of its digits is 2160, while the sum is 30.

Adding to 123112116165 its reverse (561611211321), we get a palindrome (684723327486).

The spelling of 123112116165 in words is "one hundred twenty-three billion, one hundred twelve million, one hundred sixteen thousand, one hundred sixty-five".