12111111001011 has 16 divisors (see below), whose sum is σ = 17617107575808. Its totient is φ = 7339673056800.

The previous prime is 12111111000997. The next prime is 12111111001021. The reversal of 12111111001011 is 11010011111121.

12111111001011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12111111001011 - 2⁵ = 12111111000979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111111001021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9231075 + ... + 10461116.

It is an arithmetic number, because the mean of its divisors is an integer number (1101069223488).

Almost surely, 2^{12111111001011} is an apocalyptic number.

12111111001011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111111001011 is a deficient number, since it is larger than the sum of its proper divisors (5505996574797).

12111111001011 is a wasteful number, since it uses less digits than its factorization.

12111111001011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19710842.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 12111111001011 its reverse (11010011111121), we get a palindrome (23121122112132).

It can be divided in two parts, 1211111 and 1001011, that added together give a palindrome (2212122).

The spelling of 12111111001011 in words is "twelve trillion, one hundred eleven billion, one hundred eleven million, one thousand, eleven".