13223202221 has 2 divisors, whose sum is σ = 13223202222. Its totient is φ = 13223202220.

The previous prime is 13223202199. The next prime is 13223202269. The reversal of 13223202221 is 12220232231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11154316996 + 2068885225 = 105614^2 + 45485^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13223202221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13223202193 and 13223202202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13223202271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6611601110 + 6611601111.

It is an arithmetic number, because the mean of its divisors is an integer number (6611601111).

Almost surely, 2^13223202221 is an apocalyptic number.

It is an amenable number.

13223202221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13223202221 is an equidigital number, since it uses as much as digits as its factorization.

13223202221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 13223202221 its reverse (12220232231), we get a palindrome (25443434452).

The spelling of 13223202221 in words is "thirteen billion, two hundred twenty-three million, two hundred two thousand, two hundred twenty-one".