13220221211 has 4 divisors (see below), whose sum is σ = 13225322232. Its totient is φ = 13215120192.

The previous prime is 13220221181. The next prime is 13220221253. The reversal of 13220221211 is 11212202231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11212202231 = 397 ⋅28242323.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13220221211 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13220221211.

It is not an unprimeable number, because it can be changed into a prime (13220221291) 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, 2546621 + ... + 2551806.

It is an arithmetic number, because the mean of its divisors is an integer number (3306330558).

Almost surely, 2^13220221211 is an apocalyptic number.

13220221211 is a deficient number, since it is larger than the sum of its proper divisors (5101021).

13220221211 is an equidigital number, since it uses as much as digits as its factorization.

13220221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101020.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 13220221211 its reverse (11212202231), we get a palindrome (24432423442).

The spelling of 13220221211 in words is "thirteen billion, two hundred twenty million, two hundred twenty-one thousand, two hundred eleven".