12111203121203 has 4 divisors (see below), whose sum is σ = 12111396570120. Its totient is φ = 12111009672288.

The previous prime is 12111203121197. The next prime is 12111203121253. The reversal of 12111203121203 is 30212130211121.

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-12111203121203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111203121253) 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, 96630518 + ... + 96755771.

It is an arithmetic number, because the mean of its divisors is an integer number (3027849142530).

Almost surely, 2^{12111203121203} is an apocalyptic number.

12111203121203 is a deficient number, since it is larger than the sum of its proper divisors (193448917).

12111203121203 is an equidigital number, since it uses as much as digits as its factorization.

12111203121203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193448916.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12111203121203 its reverse (30212130211121), we get a palindrome (42323333332324).

The spelling of 12111203121203 in words is "twelve trillion, one hundred eleven billion, two hundred three million, one hundred twenty-one thousand, two hundred three".