13100221 has 2 divisors, whose sum is σ = 13100222. Its totient is φ = 13100220.

The previous prime is 13100209. The next prime is 13100231. The reversal of 13100221 is 12200131.

13100221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (13100231) can be obtained adding 13100221 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13032100 + 68121 = 3610^2 + 261^2 .

It is a cyclic number.

It is not a de Polignac number, because 13100221 - 2⁵ = 13100189 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13100198 and 13100207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13100231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6550110 + 6550111.

It is an arithmetic number, because the mean of its divisors is an integer number (6550111).

Almost surely, 2^13100221 is an apocalyptic number.

It is an amenable number.

13100221 is a deficient number, since it is larger than the sum of its proper divisors (1).

13100221 is an equidigital number, since it uses as much as digits as its factorization.

13100221 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 10.

The square root of 13100221 is about 3619.4227440298. The cubic root of 13100221 is about 235.7361613875.

Adding to 13100221 its reverse (12200131), we get a palindrome (25300352).

The spelling of 13100221 in words is "thirteen million, one hundred thousand, two hundred twenty-one".