13121204 has 12 divisors (see below), whose sum is σ = 22987524. Its totient is φ = 6553344.

The previous prime is 13121203. The next prime is 13121209. The reversal of 13121204 is 40212131.

It can be written as a sum of positive squares in 2 ways, for example, as 11155600 + 1965604 = 3340^2 + 1402^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5822 + ... + 7754.

It is an arithmetic number, because the mean of its divisors is an integer number (1915627).

Almost surely, 2^13121204 is an apocalyptic number.

It is an amenable number.

13121204 is a deficient number, since it is larger than the sum of its proper divisors (9866320).

13121204 is a wasteful number, since it uses less digits than its factorization.

13121204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634 (or 3632 counting only the distinct ones).

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

The square root of 13121204 is about 3622.3202508889. The cubic root of 13121204 is about 235.8619560405.

Adding to 13121204 its reverse (40212131), we get a palindrome (53333335).

The spelling of 13121204 in words is "thirteen million, one hundred twenty-one thousand, two hundred four".