12011100203 has 4 divisors (see below), whose sum is σ = 12021740040. Its totient is φ = 12000460368.

The previous prime is 12011100191. The next prime is 12011100217. The reversal of 12011100203 is 30200111021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30200111021 = 1049 ⋅28789429.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12011100203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011100293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5318225 + ... + 5320482.

It is an arithmetic number, because the mean of its divisors is an integer number (3005435010).

Almost surely, 2^12011100203 is an apocalyptic number.

12011100203 is a deficient number, since it is larger than the sum of its proper divisors (10639837).

12011100203 is a wasteful number, since it uses less digits than its factorization.

12011100203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10639836.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 12011100203 its reverse (30200111021), we get a palindrome (42211211224).

The spelling of 12011100203 in words is "twelve billion, eleven million, one hundred thousand, two hundred three".