12021112211 has 4 divisors (see below), whose sum is σ = 12021503400. Its totient is φ = 12020721024.

The previous prime is 12021112177. The next prime is 12021112231. The reversal of 12021112211 is 11221112021.

12021112211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12021112211 - 2²² = 12016917907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12021112231) 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 3 ways as a sum of consecutive naturals, for example, 145166 + ... + 212403.

It is an arithmetic number, because the mean of its divisors is an integer number (3005375850).

Almost surely, 2^12021112211 is an apocalyptic number.

12021112211 is a deficient number, since it is larger than the sum of its proper divisors (391189).

12021112211 is an equidigital number, since it uses as much as digits as its factorization.

12021112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391188.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12021112211 its reverse (11221112021), we get a palindrome (23242224232).

It can be divided in two parts, 12021 and 112211, that multiplied together give a palindrome (1348888431).

The spelling of 12021112211 in words is "twelve billion, twenty-one million, one hundred twelve thousand, two hundred eleven".