12123315166 has 16 divisors (see below), whose sum is σ = 18691352064. Its totient is φ = 5894129304.

The previous prime is 12123315151. The next prime is 12123315223. The reversal of 12123315166 is 66151332121.

It is a super-2 number, since 2×12123315166² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296896 + ... + 335251.

It is an arithmetic number, because the mean of its divisors is an integer number (1168209504).

Almost surely, 2^12123315166 is an apocalyptic number.

12123315166 is a deficient number, since it is larger than the sum of its proper divisors (6568036898).

12123315166 is a wasteful number, since it uses less digits than its factorization.

12123315166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632415.

The product of its digits is 6480, while the sum is 31.

Adding to 12123315166 its reverse (66151332121), we get a palindrome (78274647287).

The spelling of 12123315166 in words is "twelve billion, one hundred twenty-three million, three hundred fifteen thousand, one hundred sixty-six".