12011001111011 has 4 divisors (see below), whose sum is σ = 13726858412592. Its totient is φ = 10295143809432.

The previous prime is 12011001110981. The next prime is 12011001111049. The reversal of 12011001111011 is 11011110011021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12011001111011 - 2¹⁸ = 12011000848867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011001110983 and 12011001111001.

It is not an unprimeable number, because it can be changed into a prime (12011001111211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857928650780 + ... + 857928650793.

It is an arithmetic number, because the mean of its divisors is an integer number (3431714603148).

Almost surely, 2^{12011001111011} is an apocalyptic number.

12011001111011 is a deficient number, since it is larger than the sum of its proper divisors (1715857301581).

12011001111011 is an equidigital number, since it uses as much as digits as its factorization.

12011001111011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715857301580.

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

Adding to 12011001111011 its reverse (11011110011021), we get a palindrome (23022111122032).

The spelling of 12011001111011 in words is "twelve trillion, eleven billion, one million, one hundred eleven thousand, eleven".