11121111109 has 4 divisors (see below), whose sum is σ = 11131194816. Its totient is φ = 11111027404.

The previous prime is 11121111107. The next prime is 11121111121. The reversal of 11121111109 is 90111112111.

11121111109 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11121111109 - 2¹ = 11121111107 is a prime.

It is a super-2 number, since 2×11121111109² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121111101) 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, 5040199 + ... + 5042404.

It is an arithmetic number, because the mean of its divisors is an integer number (2782798704).

Almost surely, 2^11121111109 is an apocalyptic number.

It is an amenable number.

11121111109 is a deficient number, since it is larger than the sum of its proper divisors (10083707).

11121111109 is a wasteful number, since it uses less digits than its factorization.

11121111109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10083706.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 11121111109 in words is "eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred nine".