11113121011 has 4 divisors (see below), whose sum is σ = 11136918312. Its totient is φ = 11089323712.

The previous prime is 11113121009. The next prime is 11113121021. The reversal of 11113121011 is 11012131111.

11113121011 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: 11012131111 = 29 ⋅379728659.

It is a cyclic number.

It is not a de Polignac number, because 11113121011 - 2¹ = 11113121009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11113120982 and 11113121000.

It is not an unprimeable number, because it can be changed into a prime (11113121021) 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, 11897950 + ... + 11898883.

It is an arithmetic number, because the mean of its divisors is an integer number (2784229578).

Almost surely, 2^11113121011 is an apocalyptic number.

11113121011 is a deficient number, since it is larger than the sum of its proper divisors (23797301).

11113121011 is an equidigital number, since it uses as much as digits as its factorization.

11113121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23797300.

The product of its (nonzero) digits is 6, while the sum is 13.

Adding to 11113121011 its reverse (11012131111), we get a palindrome (22125252122).

The spelling of 11113121011 in words is "eleven billion, one hundred thirteen million, one hundred twenty-one thousand, eleven".