12172201 has 4 divisors (see below), whose sum is σ = 12431232. Its totient is φ = 11913172.

The previous prime is 12172189. The next prime is 12172219. The reversal of 12172201 is 10227121.

12172201 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 12172201 - 2²¹ = 10075049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12172271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129445 + ... + 129538.

It is an arithmetic number, because the mean of its divisors is an integer number (3107808).

Almost surely, 2^12172201 is an apocalyptic number.

It is an amenable number.

12172201 is a deficient number, since it is larger than the sum of its proper divisors (259031).

12172201 is an equidigital number, since it uses as much as digits as its factorization.

12172201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259030.

The product of its (nonzero) digits is 56, while the sum is 16.

The square root of 12172201 is about 3488.8681545739. The cubic root of 12172201 is about 230.0327678582.

Adding to 12172201 its reverse (10227121), we get a palindrome (22399322).

The spelling of 12172201 in words is "twelve million, one hundred seventy-two thousand, two hundred one".