12421142343 has 8 divisors (see below), whose sum is σ = 18401692400. Its totient is φ = 8280761544.

The previous prime is 12421142339. The next prime is 12421142347. The reversal of 12421142343 is 34324112421.

12421142343 is a `hidden beast` number, since 1 + 2 + 421 + 1 + 4 + 234 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (12421142339) and next prime (12421142347).

It is not a de Polignac number, because 12421142343 - 2² = 12421142339 is a prime.

It is a super-3 number, since 3×12421142343³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 460042309 = 12421142343 / (1 + 2 + 4 + 2 + 1 + 1 + 4 + 2 + 3 + 4 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421142347) 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 7 ways as a sum of consecutive naturals, for example, 230021128 + ... + 230021181.

It is an arithmetic number, because the mean of its divisors is an integer number (2300211550).

Almost surely, 2^12421142343 is an apocalyptic number.

12421142343 is a deficient number, since it is larger than the sum of its proper divisors (5980550057).

12421142343 is an equidigital number, since it uses as much as digits as its factorization.

12421142343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460042318 (or 460042312 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 12421142343 its reverse (34324112421), we get a palindrome (46745254764).

The spelling of 12421142343 in words is "twelve billion, four hundred twenty-one million, one hundred forty-two thousand, three hundred forty-three".