12111111101203 has 2 divisors, whose sum is σ = 12111111101204. Its totient is φ = 12111111101202.

The previous prime is 12111111101189. The next prime is 12111111101231. The reversal of 12111111101203 is 30210111111121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12111111101203 - 2³³ = 12102521166611 is a prime.

It is not a weakly prime, because it can be changed into another prime (12111111101303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055555550601 + 6055555550602.

It is an arithmetic number, because the mean of its divisors is an integer number (6055555550602).

Almost surely, 2^{12111111101203} is an apocalyptic number.

12111111101203 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111111101203 is an equidigital number, since it uses as much as digits as its factorization.

12111111101203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 12111111101203 its reverse (30210111111121), we get a palindrome (42321222212324).

The spelling of 12111111101203 in words is "twelve trillion, one hundred eleven billion, one hundred eleven million, one hundred one thousand, two hundred three".