13222221100321 has 4 divisors (see below), whose sum is σ = 13227030932500. Its totient is φ = 13217411268144.

The previous prime is 13222221100307. The next prime is 13222221100381. The reversal of 13222221100321 is 12300112222231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4542780704400 + 8679440395921 = 2131380^2 + 2946089^2 .

It is a cyclic number.

It is not a de Polignac number, because 13222221100321 - 2¹⁵ = 13222221067553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13222221100292 and 13222221100301.

It is not an unprimeable number, because it can be changed into a prime (13222221100381) 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, 2404911966 + ... + 2404917463.

It is an arithmetic number, because the mean of its divisors is an integer number (3306757733125).

Almost surely, 2^{13222221100321} is an apocalyptic number.

It is an amenable number.

13222221100321 is a deficient number, since it is larger than the sum of its proper divisors (4809832179).

13222221100321 is an equidigital number, since it uses as much as digits as its factorization.

13222221100321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4809832178.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 13222221100321 its reverse (12300112222231), we get a palindrome (25522333322552).

The spelling of 13222221100321 in words is "thirteen trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred thousand, three hundred twenty-one".