12221125 has 16 divisors (see below), whose sum is σ = 17432064. Its totient is φ = 8379600.

The previous prime is 12221117. The next prime is 12221171. The reversal of 12221125 is 52112221.

It is a happy number.

It is not a de Polignac number, because 12221125 - 2³ = 12221117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12221099 and 12221108.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6109 + ... + 7858.

It is an arithmetic number, because the mean of its divisors is an integer number (1089504).

Almost surely, 2^12221125 is an apocalyptic number.

It is an amenable number.

12221125 is a deficient number, since it is larger than the sum of its proper divisors (5210939).

12221125 is an equidigital number, since it uses as much as digits as its factorization.

12221125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13989 (or 13979 counting only the distinct ones).

The product of its digits is 80, while the sum is 16.

The square root of 12221125 is about 3495.8725663273. The cubic root of 12221125 is about 230.3405478214.

Adding to 12221125 its reverse (52112221), we get a palindrome (64333346).

The spelling of 12221125 in words is "twelve million, two hundred twenty-one thousand, one hundred twenty-five".