12121328 has 10 divisors (see below), whose sum is σ = 23485104. Its totient is φ = 6060656.

The previous prime is 12121327. The next prime is 12121331. The reversal of 12121328 is 82312121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121321) 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 as a sum of consecutive naturals, namely, 378776 + ... + 378807.

Almost surely, 2^12121328 is an apocalyptic number.

It is an amenable number.

12121328 is a deficient number, since it is larger than the sum of its proper divisors (11363776).

12121328 is an equidigital number, since it uses as much as digits as its factorization.

12121328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 757591 (or 757585 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 12121328 is about 3481.5697608981. The cubic root of 12121328 is about 229.7118508713.

Adding to 12121328 its reverse (82312121), we get a palindrome (94433449).

The spelling of 12121328 in words is "twelve million, one hundred twenty-one thousand, three hundred twenty-eight".