12340123020431 has 4 divisors (see below), whose sum is σ = 12408300495864. Its totient is φ = 12271945545000.

The previous prime is 12340123020403. The next prime is 12340123020451. The reversal of 12340123020431 is 13402032104321.

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 12340123020431 - 2³⁴ = 12322943151247 is a prime.

It is a super-2 number, since 2×12340123020431² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12340123020431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12340123020451) 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, 34088737445 + ... + 34088737806.

It is an arithmetic number, because the mean of its divisors is an integer number (3102075123966).

Almost surely, 2^{12340123020431} is an apocalyptic number.

12340123020431 is a deficient number, since it is larger than the sum of its proper divisors (68177475433).

12340123020431 is an equidigital number, since it uses as much as digits as its factorization.

12340123020431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68177475432.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 12340123020431 its reverse (13402032104321), we get a palindrome (25742155124752).

The spelling of 12340123020431 in words is "twelve trillion, three hundred forty billion, one hundred twenty-three million, twenty thousand, four hundred thirty-one".