1224224221 has 8 divisors (see below), whose sum is σ = 1336457664. Its totient is φ = 1112147520.

The previous prime is 1224224171. The next prime is 1224224231.

1224224221 is nontrivially palindromic in base 10.

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

It is not a de Polignac number, because 1224224221 - 2¹³ = 1224216029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1224224192 and 1224224201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224224231) 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 7 ways as a sum of consecutive naturals, for example, 22540 + ... + 54373.

It is an arithmetic number, because the mean of its divisors is an integer number (167057208).

Almost surely, 2^1224224221 is an apocalyptic number.

1224224221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1224224221 is a deficient number, since it is larger than the sum of its proper divisors (112233443).

1224224221 is a wasteful number, since it uses less digits than its factorization.

1224224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78371.

The product of its digits is 1024, while the sum is 22.

The square root of 1224224221 is about 34988.9156876860. The cubic root of 1224224221 is about 1069.7615624413.

It can be divided in two parts, 12242 and 24221, that added together give a palindrome (36463).

The spelling of 1224224221 in words is "one billion, two hundred twenty-four million, two hundred twenty-four thousand, two hundred twenty-one".