11011110121 has 4 divisors (see below), whose sum is σ = 12012120144. Its totient is φ = 10010100100.

The previous prime is 11011110073. The next prime is 11011110161. The reversal of 11011110121 is 12101111011.

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 not a de Polignac number, because 11011110121 - 2²¹ = 11009012969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11011110098 and 11011110107.

It is not an unprimeable number, because it can be changed into a prime (11011110161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 500504995 + ... + 500505016.

It is an arithmetic number, because the mean of its divisors is an integer number (3003030036).

Almost surely, 2^11011110121 is an apocalyptic number.

11011110121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11011110121 is a deficient number, since it is larger than the sum of its proper divisors (1001010023).

11011110121 is a wasteful number, since it uses less digits than its factorization.

11011110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001010022.

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

Adding to 11011110121 its reverse (12101111011), we get a palindrome (23112221132).

The spelling of 11011110121 in words is "eleven billion, eleven million, one hundred ten thousand, one hundred twenty-one".