123456222165 has 8 divisors (see below), whose sum is σ = 197529955488. Its totient is φ = 65843318480.

The previous prime is 123456222163. The next prime is 123456222179. The reversal of 123456222165 is 561222654321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123456222165 - 2¹ = 123456222163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123456222163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4115207391 + ... + 4115207420.

It is an arithmetic number, because the mean of its divisors is an integer number (24691244436).

Almost surely, 2^123456222165 is an apocalyptic number.

123456222165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123456222165 is a deficient number, since it is larger than the sum of its proper divisors (74073733323).

123456222165 is an equidigital number, since it uses as much as digits as its factorization.

123456222165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8230414819.

The product of its digits is 172800, while the sum is 39.

Adding to 123456222165 its reverse (561222654321), we get a palindrome (684678876486).

The spelling of 123456222165 in words is "one hundred twenty-three billion, four hundred fifty-six million, two hundred twenty-two thousand, one hundred sixty-five".