12001020111011 has 2 divisors, whose sum is σ = 12001020111012. Its totient is φ = 12001020111010.

The previous prime is 12001020110971. The next prime is 12001020111013. The reversal of 12001020111011 is 11011102010021.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001020111011 is a prime.

Together with 12001020111013, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001020110983 and 12001020111001.

It is not a weakly prime, because it can be changed into another prime (12001020111013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6000510055505 + 6000510055506.

It is an arithmetic number, because the mean of its divisors is an integer number (6000510055506).

Almost surely, 2^{12001020111011} is an apocalyptic number.

12001020111011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001020111011 is an equidigital number, since it uses as much as digits as its factorization.

12001020111011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 12001020111011 its reverse (11011102010021), we get a palindrome (23012122121032).

The spelling of 12001020111011 in words is "twelve trillion, one billion, twenty million, one hundred eleven thousand, eleven".