12021136 has 10 divisors (see below), whose sum is σ = 23290982. Its totient is φ = 6010560.

The previous prime is 12021131. The next prime is 12021179. The reversal of 12021136 is 63112021.

It can be written as a sum of positive squares in only one way, i.e., 11861136 + 160000 = 3444^2 + 400^2 .

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 751321 = 12021136 / (1 + 2 + 0 + 2 + 1 + 1 + 3 + 6).

It is not an unprimeable number, because it can be changed into a prime (12021131) 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, 375645 + ... + 375676.

Almost surely, 2^12021136 is an apocalyptic number.

12021136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12021136 is a deficient number, since it is larger than the sum of its proper divisors (11269846).

12021136 is an equidigital number, since it uses as much as digits as its factorization.

12021136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751329 (or 751323 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12021136 is about 3467.1509918087. The cubic root of 12021136 is about 229.0771845615.

Adding to 12021136 its reverse (63112021), we get a palindrome (75133157).

The spelling of 12021136 in words is "twelve million, twenty-one thousand, one hundred thirty-six".