13121104 has 20 divisors (see below), whose sum is σ = 25903476. Its totient is φ = 6436352.

The previous prime is 13121099. The next prime is 13121117. The reversal of 13121104 is 40112131.

It can be written as a sum of positive squares in 2 ways, for example, as 7551504 + 5569600 = 2748^2 + 2360^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6889 + ... + 8584.

Almost surely, 2^13121104 is an apocalyptic number.

It is an amenable number.

13121104 is a deficient number, since it is larger than the sum of its proper divisors (12782372).

13121104 is a wasteful number, since it uses less digits than its factorization.

13121104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15534 (or 15528 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 13121104 is about 3622.3064475552. The cubic root of 13121104 is about 235.8613568511.

Adding to 13121104 its reverse (40112131), we get a palindrome (53233235).

It can be divided in two parts, 13121 and 104, that added together give a square (13225 = 115²).

The spelling of 13121104 in words is "thirteen million, one hundred twenty-one thousand, one hundred four".