1222243221 has 16 divisors (see below), whose sum is σ = 1638088704. Its totient is φ = 810625584.

The previous prime is 1222243219. The next prime is 1222243241. The reversal of 1222243221 is 1223422221.

It is not a de Polignac number, because 1222243221 - 2¹ = 1222243219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222243241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 552700 + ... + 554906.

It is an arithmetic number, because the mean of its divisors is an integer number (102380544).

Almost surely, 2^1222243221 is an apocalyptic number.

It is an amenable number.

1222243221 is a deficient number, since it is larger than the sum of its proper divisors (415845483).

1222243221 is a wasteful number, since it uses less digits than its factorization.

1222243221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3080.

The product of its digits is 768, while the sum is 21.

The square root of 1222243221 is about 34960.5952609506. The cubic root of 1222243221 is about 1069.1842330818.

Adding to 1222243221 its reverse (1223422221), we get a palindrome (2445665442).

The spelling of 1222243221 in words is "one billion, two hundred twenty-two million, two hundred forty-three thousand, two hundred twenty-one".