12011020011011 has 16 divisors (see below), whose sum is σ = 14535545183424. Its totient is φ = 9688761268224.

The previous prime is 12011020011007. The next prime is 12011020011017. The reversal of 12011020011011 is 11011002011021.

It is a cyclic number.

It is not a de Polignac number, because 12011020011011 - 2² = 12011020011007 is a prime.

It is a super-2 number, since 2×12011020011011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011020010983 and 12011020011001.

It is not an unprimeable number, because it can be changed into a prime (12011020011017) 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, 2724860 + ... + 5607753.

It is an arithmetic number, because the mean of its divisors is an integer number (908471573964).

Almost surely, 2^{12011020011011} is an apocalyptic number.

12011020011011 is a deficient number, since it is larger than the sum of its proper divisors (2524525172413).

12011020011011 is a wasteful number, since it uses less digits than its factorization.

12011020011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8344750.

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

Adding to 12011020011011 its reverse (11011002011021), we get a palindrome (23022022022032).

The spelling of 12011020011011 in words is "twelve trillion, eleven billion, twenty million, eleven thousand, eleven".