12312340143 has 4 divisors (see below), whose sum is σ = 16416453528. Its totient is φ = 8208226760.

The previous prime is 12312340069. The next prime is 12312340163. The reversal of 12312340143 is 34104321321.

It is a happy number.

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 12312340143 - 2¹³ = 12312331951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12312340163) 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, 2052056688 + ... + 2052056693.

It is an arithmetic number, because the mean of its divisors is an integer number (4104113382).

Almost surely, 2^12312340143 is an apocalyptic number.

12312340143 is a deficient number, since it is larger than the sum of its proper divisors (4104113385).

12312340143 is an equidigital number, since it uses as much as digits as its factorization.

12312340143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104113384.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 12312340143 its reverse (34104321321), we get a palindrome (46416661464).

The spelling of 12312340143 in words is "twelve billion, three hundred twelve million, three hundred forty thousand, one hundred forty-three".