13210043221 has 4 divisors (see below), whose sum is σ = 13268237472. Its totient is φ = 13151848972.

The previous prime is 13210043219. The next prime is 13210043233. The reversal of 13210043221 is 12234001231.

It is a happy number.

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 13210043221 - 2¹ = 13210043219 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 (13210043251) 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, 29096785 + ... + 29097238.

It is an arithmetic number, because the mean of its divisors is an integer number (3317059368).

Almost surely, 2^13210043221 is an apocalyptic number.

It is an amenable number.

13210043221 is a deficient number, since it is larger than the sum of its proper divisors (58194251).

13210043221 is an equidigital number, since it uses as much as digits as its factorization.

13210043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58194250.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 13210043221 its reverse (12234001231), we get a palindrome (25444044452).

The spelling of 13210043221 in words is "thirteen billion, two hundred ten million, forty-three thousand, two hundred twenty-one".