12121504 has 24 divisors (see below), whose sum is σ = 24195780. Its totient is φ = 5976576.

The previous prime is 12121481. The next prime is 12121511. The reversal of 12121504 is 40512121.

12121504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11696400 + 425104 = 3420^2 + 652^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 259 + ... + 4930.

Almost surely, 2^12121504 is an apocalyptic number.

It is an amenable number.

12121504 is a deficient number, since it is larger than the sum of its proper divisors (12074276).

12121504 is an equidigital number, since it uses as much as digits as its factorization.

12121504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272 (or 5264 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 12121504 is about 3481.5950367612. The cubic root of 12121504 is about 229.7129626607.

Adding to 12121504 its reverse (40512121), we get a palindrome (52633625).

The spelling of 12121504 in words is "twelve million, one hundred twenty-one thousand, five hundred four".