12111332211111 has 64 divisors (see below), whose sum is σ = 18989230247936. Its totient is φ = 6721263360000.

The previous prime is 12111332211103. The next prime is 12111332211157. The reversal of 12111332211111 is 11111223311121.

It is not a de Polignac number, because 12111332211111 - 2³ = 12111332211103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111332216111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1471067451 + ... + 1471075683.

It is an arithmetic number, because the mean of its divisors is an integer number (296706722624).

Almost surely, 2^{12111332211111} is an apocalyptic number.

12111332211111 is a deficient number, since it is larger than the sum of its proper divisors (6877898036825).

12111332211111 is a wasteful number, since it uses less digits than its factorization.

12111332211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11552.

The product of its digits is 72, while the sum is 21.

Adding to 12111332211111 its reverse (11111223311121), we get a palindrome (23222555522232).

The spelling of 12111332211111 in words is "twelve trillion, one hundred eleven billion, three hundred thirty-two million, two hundred eleven thousand, one hundred eleven".