12420020033 has 4 divisors (see below), whose sum is σ = 12960020928. Its totient is φ = 11880019140.

The previous prime is 12420019999. The next prime is 12420020047. The reversal of 12420020033 is 33002002421.

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: 33002002421 = 83 ⋅397614487.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12420020033 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12420019993 and 12420020020.

It is not an unprimeable number, because it can be changed into a prime (12420020233) 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, 270000413 + ... + 270000458.

It is an arithmetic number, because the mean of its divisors is an integer number (3240005232).

Almost surely, 2^12420020033 is an apocalyptic number.

It is an amenable number.

12420020033 is a deficient number, since it is larger than the sum of its proper divisors (540000895).

12420020033 is an equidigital number, since it uses as much as digits as its factorization.

12420020033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540000894.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 12420020033 its reverse (33002002421), we get a palindrome (45422022454).

The spelling of 12420020033 in words is "twelve billion, four hundred twenty million, twenty thousand, thirty-three".