12111101011 has 4 divisors (see below), whose sum is σ = 12748527400. Its totient is φ = 11473674624.

The previous prime is 12111101003. The next prime is 12111101033. The reversal of 12111101011 is 11010111121.

12111101011 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: 11010111121 = 6353 ⋅1733057.

It is a cyclic number.

It is not a de Polignac number, because 12111101011 - 2³ = 12111101003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111105011) 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, 318713166 + ... + 318713203.

It is an arithmetic number, because the mean of its divisors is an integer number (3187131850).

Almost surely, 2^12111101011 is an apocalyptic number.

12111101011 is a deficient number, since it is larger than the sum of its proper divisors (637426389).

12111101011 is an equidigital number, since it uses as much as digits as its factorization.

12111101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637426388.

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

Adding to 12111101011 its reverse (11010111121), we get a palindrome (23121212132).

It can be divided in two parts, 1211110 and 1011, that added together give a palindrome (1212121).

The spelling of 12111101011 in words is "twelve billion, one hundred eleven million, one hundred one thousand, eleven".