12111100100203 has 4 divisors (see below), whose sum is σ = 13042723184848. Its totient is φ = 11179477015560.

The previous prime is 12111100100153. The next prime is 12111100100219. The reversal of 12111100100203 is 30200100111121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 12111100100203 - 2²¹ = 12111098003051 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 931623084631 = 12111100100203 / (1 + 2 + 1 + 1 + 1 + 1 + 0 + 0 + 1 + 0 + 0 + 2 + 0 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111100100903) 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, 465811542303 + ... + 465811542328.

It is an arithmetic number, because the mean of its divisors is an integer number (3260680796212).

Almost surely, 2^{12111100100203} is an apocalyptic number.

12111100100203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12111100100203 is a deficient number, since it is larger than the sum of its proper divisors (931623084645).

12111100100203 is an equidigital number, since it uses as much as digits as its factorization.

12111100100203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931623084644.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12111100100203 its reverse (30200100111121), we get a palindrome (42311200211324).

The spelling of 12111100100203 in words is "twelve trillion, one hundred eleven billion, one hundred million, one hundred thousand, two hundred three".