123000310000 has 100 divisors (see below), whose sum is σ = 308065606200. Its totient is φ = 47503456000.

The previous prime is 123000309977. The next prime is 123000310039. The reversal of 123000310000 is 13000321.

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×123000310000² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77931 + ... + 502069.

It is an arithmetic number, because the mean of its divisors is an integer number (3080656062).

Almost surely, 2^123000310000 is an apocalyptic number.

123000310000 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 123000310000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154032803100).

123000310000 is an abundant number, since it is smaller than the sum of its proper divisors (185065296200).

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

123000310000 is an equidigital number, since it uses as much as digits as its factorization.

123000310000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424196 (or 424175 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 10.

Adding to 123000310000 its reverse (13000321), we get a palindrome (123013310321).

The spelling of 123000310000 in words is "one hundred twenty-three billion, three hundred ten thousand".