12210172 has 12 divisors (see below), whose sum is σ = 23011576. Its totient is φ = 5635440.

The previous prime is 12210137. The next prime is 12210173. The reversal of 12210172 is 27101221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12210173) 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, 117354 + ... + 117457.

Almost surely, 2^12210172 is an apocalyptic number.

It is an amenable number.

12210172 is a deficient number, since it is larger than the sum of its proper divisors (10801404).

12210172 is a wasteful number, since it uses less digits than its factorization.

12210172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234828 (or 234826 counting only the distinct ones).

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

The square root of 12210172 is about 3494.3056534883. The cubic root of 12210172 is about 230.2717141664.

Adding to 12210172 its reverse (27101221), we get a palindrome (39311393).

The spelling of 12210172 in words is "twelve million, two hundred ten thousand, one hundred seventy-two".