11121112121 has 8 divisors (see below), whose sum is σ = 12835683264. Its totient is φ = 9438001200.

The previous prime is 11121112039. The next prime is 11121112141. The reversal of 11121112121 is 12121112111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11121112121 - 2¹⁰ = 11121111097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11121112096 and 11121112105.

It is not an unprimeable number, because it can be changed into a prime (11121112141) 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 7 ways as a sum of consecutive naturals, for example, 7864295 + ... + 7865708.

It is an arithmetic number, because the mean of its divisors is an integer number (1604460408).

Almost surely, 2^11121112121 is an apocalyptic number.

It is an amenable number.

11121112121 is a deficient number, since it is larger than the sum of its proper divisors (1714571143).

11121112121 is a wasteful number, since it uses less digits than its factorization.

11121112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15730111.

The product of its digits is 8, while the sum is 14.

Adding to 11121112121 its reverse (12121112111), we get a palindrome (23242224232).

The spelling of 11121112121 in words is "eleven billion, one hundred twenty-one million, one hundred twelve thousand, one hundred twenty-one".