12011212011 has 16 divisors (see below), whose sum is σ = 16959845664. Its totient is φ = 7535184384.

The previous prime is 12011212001. The next prime is 12011212013. The reversal of 12011212011 is 11021211021.

It is not a de Polignac number, because 12011212011 - 2²⁵ = 11977657579 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12011212013) 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, 357925 + ... + 390041.

It is an arithmetic number, because the mean of its divisors is an integer number (1059990354).

Almost surely, 2^12011212011 is an apocalyptic number.

12011212011 is a deficient number, since it is larger than the sum of its proper divisors (4948633653).

12011212011 is a wasteful number, since it uses less digits than its factorization.

12011212011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39470.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12011212011 its reverse (11021211021), we get a palindrome (23032423032).

The spelling of 12011212011 in words is "twelve billion, eleven million, two hundred twelve thousand, eleven".