12220361 has 2 divisors, whose sum is σ = 12220362. Its totient is φ = 12220360.

The previous prime is 12220333. The next prime is 12220393. The reversal of 12220361 is 16302221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8667136 + 3553225 = 2944^2 + 1885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220361 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12220301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110180 + 6110181.

It is an arithmetic number, because the mean of its divisors is an integer number (6110181).

Almost surely, 2^12220361 is an apocalyptic number.

It is an amenable number.

12220361 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220361 is an equidigital number, since it uses as much as digits as its factorization.

12220361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 12220361 is about 3495.7632929019. The cubic root of 12220361 is about 230.3357478311.

Adding to 12220361 its reverse (16302221), we get a palindrome (28522582).

The spelling of 12220361 in words is "twelve million, two hundred twenty thousand, three hundred sixty-one".