12011200303123 has 4 divisors (see below), whose sum is σ = 13727086060720. Its totient is φ = 10295314545528.

The previous prime is 12011200303111. The next prime is 12011200303159. The reversal of 12011200303123 is 32130300211021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011200303123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12011200303123.

It is not an unprimeable number, because it can be changed into a prime (12011200303523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857942878788 + ... + 857942878801.

It is an arithmetic number, because the mean of its divisors is an integer number (3431771515180).

Almost surely, 2^{12011200303123} is an apocalyptic number.

12011200303123 is a deficient number, since it is larger than the sum of its proper divisors (1715885757597).

12011200303123 is an equidigital number, since it uses as much as digits as its factorization.

12011200303123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715885757596.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12011200303123 its reverse (32130300211021), we get a palindrome (44141500514144).

The spelling of 12011200303123 in words is "twelve trillion, eleven billion, two hundred million, three hundred three thousand, one hundred twenty-three".