123011200000 has 264 divisors, whose sum is σ = 331113041784. Its totient is φ = 45404160000.

The previous prime is 123011199991. The next prime is 123011200001. The reversal of 123011200000 is 2110321.

It can be written as a sum of positive squares in 12 ways, for example, as 110309008384 + 12702191616 = 332128^2 + 112704^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 123011200000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123011200001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41598522 + ... + 41601478.

Almost surely, 2^123011200000 is an apocalyptic number.

123011200000 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 123011200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165556520892).

123011200000 is an abundant number, since it is smaller than the sum of its proper divisors (208101841784).

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

123011200000 is an frugal number, since it uses more digits than its factorization.

123011200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3015 (or 2977 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

Adding to 123011200000 its reverse (2110321), we get a palindrome (123013310321).

The spelling of 123011200000 in words is "one hundred twenty-three billion, eleven million, two hundred thousand".