13101221 has 4 divisors (see below), whose sum is σ = 14972832. Its totient is φ = 11229612.

The previous prime is 13101211. The next prime is 13101223. The reversal of 13101221 is 12210131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13101221 - 2⁶ = 13101157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13101223) 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, 935795 + ... + 935808.

It is an arithmetic number, because the mean of its divisors is an integer number (3743208).

Almost surely, 2^13101221 is an apocalyptic number.

It is an amenable number.

13101221 is a deficient number, since it is larger than the sum of its proper divisors (1871611).

13101221 is an equidigital number, since it uses as much as digits as its factorization.

13101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1871610.

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

The square root of 13101221 is about 3619.5608849693. The cubic root of 13101221 is about 235.7421595093.

Adding to 13101221 its reverse (12210131), we get a palindrome (25311352).

The spelling of 13101221 in words is "thirteen million, one hundred one thousand, two hundred twenty-one".