12025221 has 16 divisors (see below), whose sum is σ = 17329536. Its totient is φ = 7373376.

The previous prime is 12025183. The next prime is 12025229. The reversal of 12025221 is 12252021.

It is not a de Polignac number, because 12025221 - 2¹⁹ = 11500933 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12025221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12025229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19311 + ... + 19923.

It is an arithmetic number, because the mean of its divisors is an integer number (1083096).

Almost surely, 2^12025221 is an apocalyptic number.

It is an amenable number.

12025221 is a deficient number, since it is larger than the sum of its proper divisors (5304315).

12025221 is a wasteful number, since it uses less digits than its factorization.

12025221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 12025221 is about 3467.7400421600. The cubic root of 12025221 is about 229.1031298166.

Adding to 12025221 its reverse (12252021), we get a palindrome (24277242).

It can be divided in two parts, 12025 and 221, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 12025221 in words is "twelve million, twenty-five thousand, two hundred twenty-one".