12312320011 has 4 divisors (see below), whose sum is σ = 12736882800. Its totient is φ = 11887757224.

The previous prime is 12312319997. The next prime is 12312320063. The reversal of 12312320011 is 11002321321.

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 12312320011 - 2⁹ = 12312319499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12312320071) 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 3 ways as a sum of consecutive naturals, for example, 212281351 + ... + 212281408.

It is an arithmetic number, because the mean of its divisors is an integer number (3184220700).

Almost surely, 2^12312320011 is an apocalyptic number.

12312320011 is a deficient number, since it is larger than the sum of its proper divisors (424562789).

12312320011 is an equidigital number, since it uses as much as digits as its factorization.

12312320011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424562788.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 12312320011 its reverse (11002321321), we get a palindrome (23314641332).

The spelling of 12312320011 in words is "twelve billion, three hundred twelve million, three hundred twenty thousand, eleven".