13221105 has 8 divisors (see below), whose sum is σ = 21153792. Its totient is φ = 7051248.

The previous prime is 13221101. The next prime is 13221137. The reversal of 13221105 is 50112231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13221105 - 2² = 13221101 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 881407 = 13221105 / (1 + 3 + 2 + 2 + 1 + 1 + 0 + 5).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13221101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 440689 + ... + 440718.

It is an arithmetic number, because the mean of its divisors is an integer number (2644224).

Almost surely, 2^13221105 is an apocalyptic number.

13221105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13221105 is a deficient number, since it is larger than the sum of its proper divisors (7932687).

13221105 is an equidigital number, since it uses as much as digits as its factorization.

13221105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881415.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 13221105 is about 3636.0837449102. The cubic root of 13221105 is about 236.4590378515.

Adding to 13221105 its reverse (50112231), we get a palindrome (63333336).

The spelling of 13221105 in words is "thirteen million, two hundred twenty-one thousand, one hundred five".