13121128 has 16 divisors (see below), whose sum is σ = 25020000. Its totient is φ = 6449136.

The previous prime is 13121117. The next prime is 13121159. The reversal of 13121128 is 82112131.

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, 13428 + ... + 14371.

It is an arithmetic number, because the mean of its divisors is an integer number (1563750).

Almost surely, 2^13121128 is an apocalyptic number.

It is an amenable number.

13121128 is a deficient number, since it is larger than the sum of its proper divisors (11898872).

13121128 is a wasteful number, since it uses less digits than its factorization.

13121128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27864 (or 27860 counting only the distinct ones).

The product of its digits is 96, while the sum is 19.

The square root of 13121128 is about 3622.3097603601. The cubic root of 13121128 is about 235.8615006569.

Adding to 13121128 its reverse (82112131), we get a palindrome (95233259).

The spelling of 13121128 in words is "thirteen million, one hundred twenty-one thousand, one hundred twenty-eight".