13234424221 has 4 divisors (see below), whose sum is σ = 13247041500. Its totient is φ = 13221806944.

The previous prime is 13234424219. The next prime is 13234424233. The reversal of 13234424221 is 12242443231.

13234424221 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, and also an emirpimes, since its reverse is a distinct semiprime: 12242443231 = 739 ⋅16566229.

It can be written as a sum of positive squares in 2 ways, for example, as 5632502500 + 7601921721 = 75050^2 + 87189^2 .

It is a cyclic number.

It is not a de Polignac number, because 13234424221 - 2¹ = 13234424219 is a prime.

It is a super-2 number, since 2×13234424221² (a number of 21 digits) contains 22 as substring.

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 13234424221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13234424251) 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, 6307066 + ... + 6309163.

It is an arithmetic number, because the mean of its divisors is an integer number (3311760375).

Almost surely, 2^13234424221 is an apocalyptic number.

It is an amenable number.

13234424221 is a deficient number, since it is larger than the sum of its proper divisors (12617279).

13234424221 is a wasteful number, since it uses less digits than its factorization.

13234424221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12617278.

The product of its digits is 9216, while the sum is 28.

Adding to 13234424221 its reverse (12242443231), we get a palindrome (25476867452).

The spelling of 13234424221 in words is "thirteen billion, two hundred thirty-four million, four hundred twenty-four thousand, two hundred twenty-one".