11100121111 has 4 divisors (see below), whose sum is σ = 11116517832. Its totient is φ = 11083724392.

The previous prime is 11100121061. The next prime is 11100121121. The reversal of 11100121111 is 11112100111.

11100121111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112100111 = 7 ⋅1587442873.

It is a cyclic number.

It is not a de Polignac number, because 11100121111 - 2⁹ = 11100120599 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 (11100121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8197345 + ... + 8198698.

It is an arithmetic number, because the mean of its divisors is an integer number (2779129458).

Almost surely, 2^11100121111 is an apocalyptic number.

11100121111 is a deficient number, since it is larger than the sum of its proper divisors (16396721).

11100121111 is an equidigital number, since it uses as much as digits as its factorization.

11100121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16396720.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 11100121111 its reverse (11112100111), we get a palindrome (22212221222).

The spelling of 11100121111 in words is "eleven billion, one hundred million, one hundred twenty-one thousand, one hundred eleven".