12111211311 has 16 divisors (see below), whose sum is σ = 16756565760. Its totient is φ = 7775288640.

The previous prime is 12111211291. The next prime is 12111211319. The reversal of 12111211311 is 11311211121.

It is not a de Polignac number, because 12111211311 - 2⁷ = 12111211183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111211319) 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, 652006 + ... + 670323.

It is an arithmetic number, because the mean of its divisors is an integer number (1047285360).

Almost surely, 2^12111211311 is an apocalyptic number.

12111211311 is a deficient number, since it is larger than the sum of its proper divisors (4645354449).

12111211311 is a wasteful number, since it uses less digits than its factorization.

12111211311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322446.

The product of its digits is 12, while the sum is 15.

Adding to 12111211311 its reverse (11311211121), we get a palindrome (23422422432).

The spelling of 12111211311 in words is "twelve billion, one hundred eleven million, two hundred eleven thousand, three hundred eleven".