12021238 has 4 divisors (see below), whose sum is σ = 18031860. Its totient is φ = 6010618.

The previous prime is 12021187. The next prime is 12021259. The reversal of 12021238 is 83212021.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005308 + ... + 3005311.

It is an arithmetic number, because the mean of its divisors is an integer number (4507965).

Almost surely, 2^12021238 is an apocalyptic number.

12021238 is a deficient number, since it is larger than the sum of its proper divisors (6010622).

12021238 is an equidigital number, since it uses as much as digits as its factorization.

12021238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010621.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 12021238 is about 3467.1657012609. The cubic root of 12021238 is about 229.0778324705.

Adding to 12021238 its reverse (83212021), we get a palindrome (95233259).

The spelling of 12021238 in words is "twelve million, twenty-one thousand, two hundred thirty-eight".