123131112000 has 448 divisors, whose sum is σ = 445342060800. Its totient is φ = 29791027200.

The previous prime is 123131111989. The next prime is 123131112001. The reversal of 123131112000 is 211131321.

It is a happy number.

It is a super-2 number, since 2×123131112000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (123131112001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 18404656 + ... + 18411344.

It is an arithmetic number, because the mean of its divisors is an integer number (994067100).

Almost surely, 2^123131112000 is an apocalyptic number.

123131112000 is a gapful number since it is divisible by the number (10) 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 123131112000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222671030400).

123131112000 is an abundant number, since it is smaller than the sum of its proper divisors (322210948800).

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

123131112000 is a wasteful number, since it uses less digits than its factorization.

123131112000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6791 (or 6771 counting only the distinct ones).

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

Adding to 123131112000 its reverse (211131321), we get a palindrome (123342243321).

The spelling of 123131112000 in words is "one hundred twenty-three billion, one hundred thirty-one million, one hundred twelve thousand".