12021101211 has 16 divisors (see below), whose sum is σ = 18398571264. Its totient is φ = 6838937184.

The previous prime is 12021101189. The next prime is 12021101219. The reversal of 12021101211 is 11210112021.

12021101211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12021101211 - 2¹⁸ = 12020839067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12021101219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1256100 + ... + 1265633.

It is an arithmetic number, because the mean of its divisors is an integer number (1149910704).

Almost surely, 2^12021101211 is an apocalyptic number.

12021101211 is a deficient number, since it is larger than the sum of its proper divisors (6377470053).

12021101211 is a wasteful number, since it uses less digits than its factorization.

12021101211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521970.

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

Adding to 12021101211 its reverse (11210112021), we get a palindrome (23231213232).

The spelling of 12021101211 in words is "twelve billion, twenty-one million, one hundred one thousand, two hundred eleven".