13221216644011 has 8 divisors (see below), whose sum is σ = 13391856460800. Its totient is φ = 13050658893480.

The previous prime is 13221216643997. The next prime is 13221216644029. The reversal of 13221216644011 is 11044661212231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13221216644011 - 2³⁷ = 13083777690539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13221216644411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20192245 + ... + 20836726.

It is an arithmetic number, because the mean of its divisors is an integer number (1673982057600).

Almost surely, 2^{13221216644011} is an apocalyptic number.

13221216644011 is a deficient number, since it is larger than the sum of its proper divisors (170639816789).

13221216644011 is an equidigital number, since it uses as much as digits as its factorization.

13221216644011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41033129.

The product of its (nonzero) digits is 13824, while the sum is 34.

Adding to 13221216644011 its reverse (11044661212231), we get a palindrome (24265877856242).

The spelling of 13221216644011 in words is "thirteen trillion, two hundred twenty-one billion, two hundred sixteen million, six hundred forty-four thousand, eleven".