12210001 has 4 divisors (see below), whose sum is σ = 12603904. Its totient is φ = 11816100.

The previous prime is 12209993. The next prime is 12210007. The reversal of 12210001 is 10001221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12210001 - 2³ = 12209993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196905 + ... + 196966.

It is an arithmetic number, because the mean of its divisors is an integer number (3150976).

Almost surely, 2^12210001 is an apocalyptic number.

It is an amenable number.

12210001 is a deficient number, since it is larger than the sum of its proper divisors (393903).

12210001 is an equidigital number, since it uses as much as digits as its factorization.

12210001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393902.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 12210001 is about 3494.2811850222. The cubic root of 12210001 is about 230.2706391980.

Adding to 12210001 its reverse (10001221), we get a palindrome (22211222).

The spelling of 12210001 in words is "twelve million, two hundred ten thousand, one".