13212303230221 has 4 divisors (see below), whose sum is σ = 13212358651744. Its totient is φ = 13212247808700.

The previous prime is 13212303230207. The next prime is 13212303230249. The reversal of 13212303230221 is 12203230321231.

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 13212303230221 - 2³¹ = 13210155746573 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 (13212303230821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27351615 + ... + 27830476.

It is an arithmetic number, because the mean of its divisors is an integer number (3303089662936).

Almost surely, 2^{13212303230221} is an apocalyptic number.

It is an amenable number.

13212303230221 is a deficient number, since it is larger than the sum of its proper divisors (55421523).

13212303230221 is an equidigital number, since it uses as much as digits as its factorization.

13212303230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55421522.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 13212303230221 its reverse (12203230321231), we get a palindrome (25415533551452).

The spelling of 13212303230221 in words is "thirteen trillion, two hundred twelve billion, three hundred three million, two hundred thirty thousand, two hundred twenty-one".