123117312 has 36 divisors (see below), whose sum is σ = 327673640. Its totient is φ = 41038848.

The previous prime is 123117311. The next prime is 123117341. The reversal of 123117312 is 213711321.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123117311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79387 + ... + 80922.

Almost surely, 2^123117312 is an apocalyptic number.

123117312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123117312 is an abundant number, since it is smaller than the sum of its proper divisors (204556328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123117312 is an equidigital number, since it uses as much as digits as its factorization.

123117312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160328 (or 160314 counting only the distinct ones).

The product of its digits is 252, while the sum is 21.

The square root of 123117312 is about 11095.8240793553. The cubic root of 123117312 is about 497.4770400926.

Adding to 123117312 its reverse (213711321), we get a palindrome (336828633).

The spelling of 123117312 in words is "one hundred twenty-three million, one hundred seventeen thousand, three hundred twelve".