123000131112 has 128 divisors (see below), whose sum is σ = 315716400000. Its totient is φ = 39920025600.

The previous prime is 123000131087. The next prime is 123000131131. The reversal of 123000131112 is 211131000321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 123000131091 and 123000131100.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98478264 + ... + 98479512.

It is an arithmetic number, because the mean of its divisors is an integer number (2466534375).

Almost surely, 2^123000131112 is an apocalyptic number.

123000131112 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 123000131112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157858200000).

123000131112 is an abundant number, since it is smaller than the sum of its proper divisors (192716268888).

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

123000131112 is a wasteful number, since it uses less digits than its factorization.

123000131112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947 (or 1943 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 123000131112 its reverse (211131000321), we get a palindrome (334131131433).

The spelling of 123000131112 in words is "one hundred twenty-three billion, one hundred thirty-one thousand, one hundred twelve".