12312312220231 has 4 divisors (see below), whose sum is σ = 12345321100552. Its totient is φ = 12279303339912.

The previous prime is 12312312220183. The next prime is 12312312220253. The reversal of 12312312220231 is 13202221321321.

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 12312312220231 - 2²³ = 12312303831623 is a prime.

It is a super-2 number, since 2×12312312220231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12312312220196 and 12312312220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312312220031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16504439601 + ... + 16504440346.

It is an arithmetic number, because the mean of its divisors is an integer number (3086330275138).

Almost surely, 2^{12312312220231} is an apocalyptic number.

12312312220231 is a deficient number, since it is larger than the sum of its proper divisors (33008880321).

12312312220231 is an equidigital number, since it uses as much as digits as its factorization.

12312312220231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33008880320.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 12312312220231 its reverse (13202221321321), we get a palindrome (25514533541552).

The spelling of 12312312220231 in words is "twelve trillion, three hundred twelve billion, three hundred twelve million, two hundred twenty thousand, two hundred thirty-one".