13420333021 has 2 divisors, whose sum is σ = 13420333022. Its totient is φ = 13420333020.

The previous prime is 13420333009. The next prime is 13420333057. The reversal of 13420333021 is 12033302431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12118927396 + 1301405625 = 110086^2 + 36075^2 .

It is a cyclic number.

It is not a de Polignac number, because 13420333021 - 2⁹ = 13420332509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13420332983 and 13420333001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13420333621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6710166510 + 6710166511.

It is an arithmetic number, because the mean of its divisors is an integer number (6710166511).

Almost surely, 2^13420333021 is an apocalyptic number.

It is an amenable number.

13420333021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13420333021 is an equidigital number, since it uses as much as digits as its factorization.

13420333021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 13420333021 its reverse (12033302431), we get a palindrome (25453635452).

The spelling of 13420333021 in words is "thirteen billion, four hundred twenty million, three hundred thirty-three thousand, twenty-one".