13204121 has 24 divisors (see below), whose sum is σ = 16445376. Its totient is φ = 10379520.

The previous prime is 13204117. The next prime is 13204123. The reversal of 13204121 is 12140231.

It is not a de Polignac number, because 13204121 - 2² = 13204117 is a prime.

It is a super-2 number, since 2×13204121² = 348697622765282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13204096 and 13204105.

It is not an unprimeable number, because it can be changed into a prime (13204123) 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, 123350 + ... + 123456.

It is an arithmetic number, because the mean of its divisors is an integer number (685224).

Almost surely, 2^13204121 is an apocalyptic number.

It is an amenable number.

13204121 is a deficient number, since it is larger than the sum of its proper divisors (3241255).

13204121 is a wasteful number, since it uses less digits than its factorization.

13204121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 13204121 is about 3633.7475146190. The cubic root of 13204121 is about 236.3577416990.

Adding to 13204121 its reverse (12140231), we get a palindrome (25344352).

The spelling of 13204121 in words is "thirteen million, two hundred four thousand, one hundred twenty-one".