12311112020231 has 4 divisors (see below), whose sum is σ = 12319324905000. Its totient is φ = 12302899135464.

The previous prime is 12311112020209. The next prime is 12311112020261. The reversal of 12311112020231 is 13202021111321.

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 12311112020231 - 2⁶ = 12311112020167 is a prime.

It is a super-2 number, since 2×12311112020231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311112020201) 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 3 ways as a sum of consecutive naturals, for example, 4106440136 + ... + 4106443133.

It is an arithmetic number, because the mean of its divisors is an integer number (3079831226250).

Almost surely, 2^{12311112020231} is an apocalyptic number.

12311112020231 is a deficient number, since it is larger than the sum of its proper divisors (8212884769).

12311112020231 is an equidigital number, since it uses as much as digits as its factorization.

12311112020231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8212884768.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12311112020231 its reverse (13202021111321), we get a palindrome (25513133131552).

The spelling of 12311112020231 in words is "twelve trillion, three hundred eleven billion, one hundred twelve million, twenty thousand, two hundred thirty-one".