12111021012211 has 4 divisors (see below), whose sum is σ = 13212022922424. Its totient is φ = 11010019102000.

The previous prime is 12111021012199. The next prime is 12111021012229. The reversal of 12111021012211 is 11221012011121.

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 12111021012211 - 2¹¹ = 12111021010163 is a prime.

It is a super-2 number, since 2×12111021012211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12111021019211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550500955090 + ... + 550500955111.

It is an arithmetic number, because the mean of its divisors is an integer number (3303005730606).

Almost surely, 2^{12111021012211} is an apocalyptic number.

12111021012211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12111021012211 is a deficient number, since it is larger than the sum of its proper divisors (1101001910213).

12111021012211 is a wasteful number, since it uses less digits than its factorization.

12111021012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101001910212.

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

Adding to 12111021012211 its reverse (11221012011121), we get a palindrome (23332033023332).

The spelling of 12111021012211 in words is "twelve trillion, one hundred eleven billion, twenty-one million, twelve thousand, two hundred eleven".