123313103112 has 64 divisors (see below), whose sum is σ = 316346690880. Its totient is φ = 40034598912.

The previous prime is 123313103077. The next prime is 123313103149. The reversal of 123313103112 is 211301313321.

It is a happy number.

It is a super-2 number, since 2×123313103112² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 195048 + ... + 533544.

It is an arithmetic number, because the mean of its divisors is an integer number (4942917045).

Almost surely, 2^123313103112 is an apocalyptic number.

123313103112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123313103112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158173345440).

123313103112 is an abundant number, since it is smaller than the sum of its proper divisors (193033587768).

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

123313103112 is a wasteful number, since it uses less digits than its factorization.

123313103112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338902 (or 338898 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 123313103112 its reverse (211301313321), we get a palindrome (334614416433).

The spelling of 123313103112 in words is "one hundred twenty-three billion, three hundred thirteen million, one hundred three thousand, one hundred twelve".