13224004421 has 4 divisors (see below), whose sum is σ = 14001887052. Its totient is φ = 12446121792.

The previous prime is 13224004373. The next prime is 13224004439. The reversal of 13224004421 is 12440042231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8890415521 + 4333588900 = 94289^2 + 65830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13224004421 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 (13224000421) 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, 388941290 + ... + 388941323.

It is an arithmetic number, because the mean of its divisors is an integer number (3500471763).

Almost surely, 2^13224004421 is an apocalyptic number.

It is an amenable number.

13224004421 is a deficient number, since it is larger than the sum of its proper divisors (777882631).

13224004421 is an equidigital number, since it uses as much as digits as its factorization.

13224004421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777882630.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 13224004421 its reverse (12440042231), we get a palindrome (25664046652).

The spelling of 13224004421 in words is "thirteen billion, two hundred twenty-four million, four thousand, four hundred twenty-one".