13221210009 has 16 divisors (see below), whose sum is σ = 20148423680. Its totient is φ = 7554295440.

The previous prime is 13221210007. The next prime is 13221210011. The reversal of 13221210009 is 90001212231.

It is an interprime number because it is at equal distance from previous prime (13221210007) and next prime (13221210011).

It is not a de Polignac number, because 13221210009 - 2¹ = 13221210007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (13221210007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296052 + ... + 337770.

It is an arithmetic number, because the mean of its divisors is an integer number (1259276480).

Almost surely, 2^13221210009 is an apocalyptic number.

It is an amenable number.

13221210009 is a deficient number, since it is larger than the sum of its proper divisors (6927213671).

13221210009 is a wasteful number, since it uses less digits than its factorization.

13221210009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56820.

The product of its (nonzero) digits is 216, while the sum is 21.

The spelling of 13221210009 in words is "thirteen billion, two hundred twenty-one million, two hundred ten thousand, nine".