13430231221 has 4 divisors (see below), whose sum is σ = 14651161344. Its totient is φ = 12209301100.

The previous prime is 13430231197. The next prime is 13430231239. The reversal of 13430231221 is 12213203431.

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 not a de Polignac number, because 13430231221 - 2⁵ = 13430231189 is a prime.

It is a super-2 number, since 2×13430231221² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13430231192 and 13430231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13430231261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610465045 + ... + 610465066.

It is an arithmetic number, because the mean of its divisors is an integer number (3662790336).

Almost surely, 2^13430231221 is an apocalyptic number.

13430231221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13430231221 is a deficient number, since it is larger than the sum of its proper divisors (1220930123).

13430231221 is a wasteful number, since it uses less digits than its factorization.

13430231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220930122.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 13430231221 its reverse (12213203431), we get a palindrome (25643434652).

The spelling of 13430231221 in words is "thirteen billion, four hundred thirty million, two hundred thirty-one thousand, two hundred twenty-one".