12312020111 has 4 divisors (see below), whose sum is σ = 12333889272. Its totient is φ = 12290150952.

The previous prime is 12312020099. The next prime is 12312020131. The reversal of 12312020111 is 11102021321.

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 12312020111 - 2¹⁰ = 12312019087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312020131) 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, 10933736 + ... + 10934861.

It is an arithmetic number, because the mean of its divisors is an integer number (3083472318).

Almost surely, 2^12312020111 is an apocalyptic number.

12312020111 is a deficient number, since it is larger than the sum of its proper divisors (21869161).

12312020111 is an equidigital number, since it uses as much as digits as its factorization.

12312020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21869160.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 12312020111 its reverse (11102021321), we get a palindrome (23414041432).

The spelling of 12312020111 in words is "twelve billion, three hundred twelve million, twenty thousand, one hundred eleven".