12420420323 has 2 divisors, whose sum is σ = 12420420324. Its totient is φ = 12420420322.

The previous prime is 12420420319. The next prime is 12420420347. The reversal of 12420420323 is 32302402421.

It is a weak prime.

It is an emirp because it is prime and its reverse (32302402421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12420420323 - 2² = 12420420319 is a prime.

It is not a weakly prime, because it can be changed into another prime (12420428323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6210210161 + 6210210162.

It is an arithmetic number, because the mean of its divisors is an integer number (6210210162).

Almost surely, 2^12420420323 is an apocalyptic number.

12420420323 is a deficient number, since it is larger than the sum of its proper divisors (1).

12420420323 is an equidigital number, since it uses as much as digits as its factorization.

12420420323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 12420420323 its reverse (32302402421), we get a palindrome (44722822744).

The spelling of 12420420323 in words is "twelve billion, four hundred twenty million, four hundred twenty thousand, three hundred twenty-three".