13243132221 has 32 divisors (see below), whose sum is σ = 20477422080. Its totient is φ = 7528392000.

The previous prime is 13243132171. The next prime is 13243132223. The reversal of 13243132221 is 12223134231.

13243132221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13243132221 - 2¹⁰ = 13243131197 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13243132191 and 13243132200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13243132223) 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 31 ways as a sum of consecutive naturals, for example, 41235 + ... + 167888.

It is an arithmetic number, because the mean of its divisors is an integer number (639919440).

Almost surely, 2^13243132221 is an apocalyptic number.

13243132221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13243132221 is a deficient number, since it is larger than the sum of its proper divisors (7234289859).

13243132221 is a wasteful number, since it uses less digits than its factorization.

13243132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209257.

The product of its digits is 1728, while the sum is 24.

Adding to 13243132221 its reverse (12223134231), we get a palindrome (25466266452).

The spelling of 13243132221 in words is "thirteen billion, two hundred forty-three million, one hundred thirty-two thousand, two hundred twenty-one".