13099221 has 24 divisors (see below), whose sum is σ = 19641440. Its totient is φ = 8405856.

The previous prime is 13099211. The next prime is 13099223. The reversal of 13099221 is 12299031.

It is not a de Polignac number, because 13099221 - 2¹⁷ = 12968149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13099223) 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 23 ways as a sum of consecutive naturals, for example, 46146 + ... + 46428.

Almost surely, 2^13099221 is an apocalyptic number.

It is an amenable number.

13099221 is a deficient number, since it is larger than the sum of its proper divisors (6542219).

13099221 is a wasteful number, since it uses less digits than its factorization.

13099221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 13099221 is about 3619.2845978176. The cubic root of 13099221 is about 235.7301629604.

The spelling of 13099221 in words is "thirteen million, ninety-nine thousand, two hundred twenty-one".