12420422533 has 4 divisors (see below), whose sum is σ = 12960440928. Its totient is φ = 11880404140.

The previous prime is 12420422519. The next prime is 12420422563. The reversal of 12420422533 is 33522402421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33522402421 = 349 ⋅96052729.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12420422533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420422563) 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, 270009163 + ... + 270009208.

It is an arithmetic number, because the mean of its divisors is an integer number (3240110232).

Almost surely, 2^12420422533 is an apocalyptic number.

It is an amenable number.

12420422533 is a deficient number, since it is larger than the sum of its proper divisors (540018395).

12420422533 is an equidigital number, since it uses as much as digits as its factorization.

12420422533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540018394.

The product of its (nonzero) digits is 11520, while the sum is 28.

Adding to 12420422533 its reverse (33522402421), we get a palindrome (45942824954).

The spelling of 12420422533 in words is "twelve billion, four hundred twenty million, four hundred twenty-two thousand, five hundred thirty-three".