12221152 has 12 divisors (see below), whose sum is σ = 24060456. Its totient is φ = 6110560.

The previous prime is 12221117. The next prime is 12221171. The reversal of 12221152 is 25112221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 190924 + ... + 190987.

It is an arithmetic number, because the mean of its divisors is an integer number (2005038).

Almost surely, 2^12221152 is an apocalyptic number.

It is an amenable number.

12221152 is a deficient number, since it is larger than the sum of its proper divisors (11839304).

12221152 is an equidigital number, since it uses as much as digits as its factorization.

12221152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381921 (or 381913 counting only the distinct ones).

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

The square root of 12221152 is about 3495.8764280220. The cubic root of 12221152 is about 230.3407174509.

Adding to 12221152 its reverse (25112221), we get a palindrome (37333373).

The spelling of 12221152 in words is "twelve million, two hundred twenty-one thousand, one hundred fifty-two".