12201172 has 12 divisors (see below), whose sum is σ = 22608180. Its totient is φ = 5741696.

The previous prime is 12201151. The next prime is 12201191. The reversal of 12201172 is 27110221.

12201172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 8375236 + 3825936 = 2894^2 + 1956^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89647 + ... + 89782.

It is an arithmetic number, because the mean of its divisors is an integer number (1884015).

Almost surely, 2^12201172 is an apocalyptic number.

It is an amenable number.

12201172 is a deficient number, since it is larger than the sum of its proper divisors (10407008).

12201172 is a wasteful number, since it uses less digits than its factorization.

12201172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179450 (or 179448 counting only the distinct ones).

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

The square root of 12201172 is about 3493.0176065975. The cubic root of 12201172 is about 230.2151232402.

Adding to 12201172 its reverse (27110221), we get a palindrome (39311393).

The spelling of 12201172 in words is "twelve million, two hundred one thousand, one hundred seventy-two".