11110121111 has 4 divisors (see below), whose sum is σ = 11183698224. Its totient is φ = 11036544000.

The previous prime is 11110121081. The next prime is 11110121117. The reversal of 11110121111 is 11112101111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11112101111 = 229 ⋅48524459.

It is a cyclic number.

It is not a de Polignac number, because 11110121111 - 2¹⁴ = 11110104727 is a prime.

It is a super-2 number, since 2×11110121111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11110121092 and 11110121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110121117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36788330 + ... + 36788631.

It is an arithmetic number, because the mean of its divisors is an integer number (2795924556).

Almost surely, 2^11110121111 is an apocalyptic number.

11110121111 is a deficient number, since it is larger than the sum of its proper divisors (73577113).

11110121111 is an equidigital number, since it uses as much as digits as its factorization.

11110121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73577112.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11110121111 its reverse (11112101111), we get a palindrome (22222222222).

The spelling of 11110121111 in words is "eleven billion, one hundred ten million, one hundred twenty-one thousand, one hundred eleven".