12111020011 has 2 divisors, whose sum is σ = 12111020012. Its totient is φ = 12111020010.

The previous prime is 12111019993. The next prime is 12111020017. The reversal of 12111020011 is 11002011121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111020011 - 2¹⁵ = 12110987243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12111020011.

It is not a weakly prime, because it can be changed into another prime (12111020017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055510005 + 6055510006.

It is an arithmetic number, because the mean of its divisors is an integer number (6055510006).

Almost surely, 2^12111020011 is an apocalyptic number.

12111020011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111020011 is an equidigital number, since it uses as much as digits as its factorization.

12111020011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 12111020011 its reverse (11002011121), we get a palindrome (23113031132).

The spelling of 12111020011 in words is "twelve billion, one hundred eleven million, twenty thousand, eleven".