13224202021 has 4 divisors (see below), whose sum is σ = 13235573952. Its totient is φ = 13212830092.

The previous prime is 13224202009. The next prime is 13224202037. The reversal of 13224202021 is 12020242231.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13224202021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13224202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13224202001) 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, 5684221 + ... + 5686546.

It is an arithmetic number, because the mean of its divisors is an integer number (3308893488).

Almost surely, 2^13224202021 is an apocalyptic number.

It is an amenable number.

13224202021 is a deficient number, since it is larger than the sum of its proper divisors (11371931).

13224202021 is a wasteful number, since it uses less digits than its factorization.

13224202021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11371930.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 13224202021 its reverse (12020242231), we get a palindrome (25244444252).

The spelling of 13224202021 in words is "thirteen billion, two hundred twenty-four million, two hundred two thousand, twenty-one".