12312311111 has 16 divisors (see below), whose sum is σ = 12679645440. Its totient is φ = 11948368320.

The previous prime is 12312311107. The next prime is 12312311117. The reversal of 12312311111 is 11111321321.

It is a cyclic number.

It is not a de Polignac number, because 12312311111 - 2² = 12312311107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12312311111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312311117) 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 15 ways as a sum of consecutive naturals, for example, 7566680 + ... + 7568306.

It is an arithmetic number, because the mean of its divisors is an integer number (792477840).

Almost surely, 2^12312311111 is an apocalyptic number.

12312311111 is a deficient number, since it is larger than the sum of its proper divisors (367334329).

12312311111 is a wasteful number, since it uses less digits than its factorization.

12312311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534.

The product of its digits is 36, while the sum is 17.

Adding to 12312311111 its reverse (11111321321), we get a palindrome (23423632432).

The spelling of 12312311111 in words is "twelve billion, three hundred twelve million, three hundred eleven thousand, one hundred eleven".