13220111 has 4 divisors (see below), whose sum is σ = 13237224. Its totient is φ = 13203000.

The previous prime is 13220099. The next prime is 13220117. The reversal of 13220111 is 11102231.

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

It is a cyclic number.

It is not a de Polignac number, because 13220111 - 2⁶ = 13220047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13220092 and 13220101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7340 + ... + 8961.

It is an arithmetic number, because the mean of its divisors is an integer number (3309306).

Almost surely, 2^13220111 is an apocalyptic number.

13220111 is a deficient number, since it is larger than the sum of its proper divisors (17113).

13220111 is an equidigital number, since it uses as much as digits as its factorization.

13220111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17112.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 13220111 is about 3635.9470568203. The cubic root of 13220111 is about 236.4531118169.

Adding to 13220111 its reverse (11102231), we get a palindrome (24322342).

It can be divided in two parts, 13220 and 111, that added together give a palindrome (13331).

The spelling of 13220111 in words is "thirteen million, two hundred twenty thousand, one hundred eleven".