13232020021221 has 4 divisors (see below), whose sum is σ = 17642693361632. Its totient is φ = 8821346680812.

The previous prime is 13232020021193. The next prime is 13232020021289. The reversal of 13232020021221 is 12212002023231.

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 not a de Polignac number, because 13232020021221 - 2¹¹ = 13232020019173 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 (13232020021721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2205336670201 + ... + 2205336670206.

It is an arithmetic number, because the mean of its divisors is an integer number (4410673340408).

Almost surely, 2^{13232020021221} is an apocalyptic number.

It is an amenable number.

13232020021221 is a deficient number, since it is larger than the sum of its proper divisors (4410673340411).

13232020021221 is an equidigital number, since it uses as much as digits as its factorization.

13232020021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4410673340410.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 13232020021221 its reverse (12212002023231), we get a palindrome (25444022044452).

The spelling of 13232020021221 in words is "thirteen trillion, two hundred thirty-two billion, twenty million, twenty-one thousand, two hundred twenty-one".