12212201 has 2 divisors, whose sum is σ = 12212202.
Its totient is φ = 12212200.
The previous prime is 12212197. The next prime is 12212237. The reversal of 12212201 is 10221221.
Adding to 12212201 its reverse (10221221), we get a palindrome (22433422).
It can be divided in two parts, 1221220 and 1, that added together give a palindrome (1221221).
It is a happy number.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 9486400 + 2725801 = 3080^2 + 1651^2
It is a cyclic number.
It is not a de Polignac number, because 12212201 - 22 = 12212197 is a prime.
It is a Chen prime.
It is a plaindrome in base 15.
It is not a weakly prime, because it can be changed into another prime (12215201) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106100 + 6106101.
It is an arithmetic number, because the mean of its divisors is an integer number (6106101).
Almost surely, 212212201 is an apocalyptic number.
It is an amenable number.
12212201 is a deficient number, since it is larger than the sum of its proper divisors (1).
12212201 is an equidigital number, since it uses as much as digits as its factorization.
12212201 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 16, while the sum is 11.
The square root of 12212201 is about 3494.5959709242.
The cubic root of 12212201 is about 230.2844684348.
The spelling of 12212201 in words is "twelve million, two hundred twelve thousand, two hundred one".