12221037 has 30 divisors (see below), whose sum is σ = 18984174. Its totient is φ = 7834320.

The previous prime is 12221029. The next prime is 12221039. The reversal of 12221037 is 73012221.

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 2802276 = 3069^2 + 1674^2 .

It is not a de Polignac number, because 12221037 - 2³ = 12221029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221039) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 77763 + ... + 77919.

Almost surely, 2^12221037 is an apocalyptic number.

It is an amenable number.

12221037 is a deficient number, since it is larger than the sum of its proper divisors (6763137).

12221037 is an equidigital number, since it uses as much as digits as its factorization.

12221037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 12221037 is about 3495.8599800335. The cubic root of 12221037 is about 230.3399949532.

Adding to 12221037 its reverse (73012221), we get a palindrome (85233258).

The spelling of 12221037 in words is "twelve million, two hundred twenty-one thousand, thirty-seven".