11121211103 has 4 divisors (see below), whose sum is σ = 11124393000. Its totient is φ = 11118029208.

The previous prime is 11121211039. The next prime is 11121211121. The reversal of 11121211103 is 30111212111.

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 11121211103 - 2⁶ = 11121211039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121211163) 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, 1585700 + ... + 1592697.

It is an arithmetic number, because the mean of its divisors is an integer number (2781098250).

Almost surely, 2^11121211103 is an apocalyptic number.

11121211103 is a deficient number, since it is larger than the sum of its proper divisors (3181897).

11121211103 is an equidigital number, since it uses as much as digits as its factorization.

11121211103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3181896.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11121211103 its reverse (30111212111), we get a palindrome (41232423214).

The spelling of 11121211103 in words is "eleven billion, one hundred twenty-one million, two hundred eleven thousand, one hundred three".