13221101 has 2 divisors, whose sum is σ = 13221102. Its totient is φ = 13221100.

The previous prime is 13221083. The next prime is 13221137. The reversal of 13221101 is 10112231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6895876 + 6325225 = 2626^2 + 2515^2 .

It is a cyclic number.

It is not a de Polignac number, because 13221101 - 2⁶ = 13221037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610550 + 6610551.

It is an arithmetic number, because the mean of its divisors is an integer number (6610551).

Almost surely, 2^13221101 is an apocalyptic number.

It is an amenable number.

13221101 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221101 is an equidigital number, since it uses as much as digits as its factorization.

13221101 is an odious number, because the sum of its binary digits is odd.

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

The square root of 13221101 is about 3636.0831948678. The cubic root of 13221101 is about 236.4590140048.

Adding to 13221101 its reverse (10112231), we get a palindrome (23333332).

The spelling of 13221101 in words is "thirteen million, two hundred twenty-one thousand, one hundred one".