13220350217 has 4 divisors (see below), whose sum is σ = 13221296916. Its totient is φ = 13219403520.

The previous prime is 13220350193. The next prime is 13220350219. The reversal of 13220350217 is 71205302231.

13220350217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71205302231 = 7 ⋅10172186033.

It can be written as a sum of positive squares in 2 ways, for example, as 13154025481 + 66324736 = 114691^2 + 8144^2 .

It is a cyclic number.

It is not a de Polignac number, because 13220350217 - 2¹² = 13220346121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13220350219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452084 + ... + 480437.

It is an arithmetic number, because the mean of its divisors is an integer number (3305324229).

Almost surely, 2^13220350217 is an apocalyptic number.

It is an amenable number.

13220350217 is a deficient number, since it is larger than the sum of its proper divisors (946699).

13220350217 is an equidigital number, since it uses as much as digits as its factorization.

13220350217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946698.

The product of its (nonzero) digits is 2520, while the sum is 26.

Adding to 13220350217 its reverse (71205302231), we get a palindrome (84425652448).

The spelling of 13220350217 in words is "thirteen billion, two hundred twenty million, three hundred fifty thousand, two hundred seventeen".