13224130021 has 2 divisors, whose sum is σ = 13224130022. Its totient is φ = 13224130020.

The previous prime is 13224130019. The next prime is 13224130109. The reversal of 13224130021 is 12003142231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6858324225 + 6365805796 = 82815^2 + 79786^2 .

It is a cyclic number.

It is not a de Polignac number, because 13224130021 - 2¹ = 13224130019 is a prime.

It is a super-2 number, since 2×13224130021² (a number of 21 digits) contains 22 as substring.

Together with 13224130019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13222130021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6612065010 + 6612065011.

It is an arithmetic number, because the mean of its divisors is an integer number (6612065011).

Almost surely, 2^13224130021 is an apocalyptic number.

It is an amenable number.

13224130021 is a deficient number, since it is larger than the sum of its proper divisors (1).

13224130021 is an equidigital number, since it uses as much as digits as its factorization.

13224130021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13224130021 its reverse (12003142231), we get a palindrome (25227272252).

The spelling of 13224130021 in words is "thirteen billion, two hundred twenty-four million, one hundred thirty thousand, twenty-one".