123181240000 has 560 divisors, whose sum is σ = 385169306368. Its totient is φ = 38029824000.

The previous prime is 123181239977. The next prime is 123181240067. The reversal of 123181240000 is 42181321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (560).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 156519607 + ... + 156520393.

Almost surely, 2^123181240000 is an apocalyptic number.

123181240000 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 123181240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192584653184).

123181240000 is an abundant number, since it is smaller than the sum of its proper divisors (261988066368).

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

123181240000 is an equidigital number, since it uses as much as digits as its factorization.

123181240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 882 (or 857 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The spelling of 123181240000 in words is "one hundred twenty-three billion, one hundred eighty-one million, two hundred forty thousand".