12011002011 has 24 divisors (see below), whose sum is σ = 17689031360. Its totient is φ = 7852018176.

The previous prime is 12011001983. The next prime is 12011002067. The reversal of 12011002011 is 11020011021.

It is a happy number.

It is not a de Polignac number, because 12011002011 - 2⁵ = 12011001979 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12011001984 and 12011002002.

It is not an unprimeable number, because it can be changed into a prime (12011002811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32046 + ... + 158268.

Almost surely, 2^12011002011 is an apocalyptic number.

12011002011 is a deficient number, since it is larger than the sum of its proper divisors (5678029349).

12011002011 is a wasteful number, since it uses less digits than its factorization.

12011002011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126435 (or 126432 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12011002011 its reverse (11020011021), we get a palindrome (23031013032).

The spelling of 12011002011 in words is "twelve billion, eleven million, two thousand, eleven".