12101111101011 has 4 divisors (see below), whose sum is σ = 16134814801352. Its totient is φ = 8067407400672.

The previous prime is 12101111101007. The next prime is 12101111101033. The reversal of 12101111101011 is 11010111110121.

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

It is not a de Polignac number, because 12101111101011 - 2² = 12101111101007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12101111101061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016851850166 + ... + 2016851850171.

It is an arithmetic number, because the mean of its divisors is an integer number (4033703700338).

Almost surely, 2^{12101111101011} is an apocalyptic number.

12101111101011 is a deficient number, since it is larger than the sum of its proper divisors (4033703700341).

12101111101011 is an equidigital number, since it uses as much as digits as its factorization.

12101111101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4033703700340.

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

Adding to 12101111101011 its reverse (11010111110121), we get a palindrome (23111222211132).

The spelling of 12101111101011 in words is "twelve trillion, one hundred one billion, one hundred eleven million, one hundred one thousand, eleven".