12221354 has 8 divisors (see below), whose sum is σ = 18964260. Its totient is φ = 5899936.

The previous prime is 12221353. The next prime is 12221357. The reversal of 12221354 is 45312221.

It can be written as a sum of positive squares in 2 ways, for example, as 10725625 + 1495729 = 3275^2 + 1223^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12221354² = 298722987186632, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12221353) 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, 105299 + ... + 105414.

Almost surely, 2^12221354 is an apocalyptic number.

12221354 is a deficient number, since it is larger than the sum of its proper divisors (6742906).

12221354 is a wasteful number, since it uses less digits than its factorization.

12221354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210744.

The product of its digits is 480, while the sum is 20.

The square root of 12221354 is about 3495.9053190840. The cubic root of 12221354 is about 230.3419865230.

Adding to 12221354 its reverse (45312221), we get a palindrome (57533575).

It can be divided in two parts, 12221 and 354, that multiplied together give a palindrome (4326234).

The spelling of 12221354 in words is "twelve million, two hundred twenty-one thousand, three hundred fifty-four".