123511040000 has 120 divisors (see below), whose sum is σ = 308606628330. Its totient is φ = 49403904000.

The previous prime is 123511039997. The next prime is 123511040011. The reversal of 123511040000 is 40115321.

It can be written as a sum of positive squares in 5 ways, for example, as 977437696 + 122533602304 = 31264^2 + 350048^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1231754 + ... + 1328246.

Almost surely, 2^123511040000 is an apocalyptic number.

123511040000 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 123511040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (154303314165).

123511040000 is an abundant number, since it is smaller than the sum of its proper divisors (185095588330).

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

123511040000 is an frugal number, since it uses more digits than its factorization.

123511040000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96535 (or 96500 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 123511040000 its reverse (40115321), we get a palindrome (123551155321).

The spelling of 123511040000 in words is "one hundred twenty-three billion, five hundred eleven million, forty thousand".