12111021021211 has 16 divisors (see below), whose sum is σ = 14445812620800. Its totient is φ = 9927569348928.

The previous prime is 12111021021173. The next prime is 12111021021221. The reversal of 12111021021211 is 11212012011121.

It is not a de Polignac number, because 12111021021211 - 2⁹ = 12111021020699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111021021221) 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 15 ways as a sum of consecutive naturals, for example, 6620146 + ... + 8249143.

It is an arithmetic number, because the mean of its divisors is an integer number (902863288800).

Almost surely, 2^{12111021021211} is an apocalyptic number.

12111021021211 is a deficient number, since it is larger than the sum of its proper divisors (2334791599589).

12111021021211 is a wasteful number, since it uses less digits than its factorization.

12111021021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14874378.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 12111021021211 its reverse (11212012011121), we get a palindrome (23323033032332).

The spelling of 12111021021211 in words is "twelve trillion, one hundred eleven billion, twenty-one million, twenty-one thousand, two hundred eleven".