13222123421 has 4 divisors (see below), whose sum is σ = 14239209852. Its totient is φ = 12205036992.

The previous prime is 13222123403. The next prime is 13222123423. The reversal of 13222123421 is 12432122231.

13222123421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2702544196 + 10519579225 = 51986^2 + 102565^2 .

It is a cyclic number.

It is not a de Polignac number, because 13222123421 - 2⁶ = 13222123357 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 (13222123423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508543196 + ... + 508543221.

It is an arithmetic number, because the mean of its divisors is an integer number (3559802463).

Almost surely, 2^13222123421 is an apocalyptic number.

It is an amenable number.

13222123421 is a deficient number, since it is larger than the sum of its proper divisors (1017086431).

13222123421 is a wasteful number, since it uses less digits than its factorization.

13222123421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017086430.

The product of its digits is 1152, while the sum is 23.

Adding to 13222123421 its reverse (12432122231), we get a palindrome (25654245652).

The spelling of 13222123421 in words is "thirteen billion, two hundred twenty-two million, one hundred twenty-three thousand, four hundred twenty-one".