1224311321 has 8 divisors (see below), whose sum is σ = 1352692224. Its totient is φ = 1102192960.

The previous prime is 1224311317. The next prime is 1224311339. The reversal of 1224311321 is 1231134221.

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

It is not a de Polignac number, because 1224311321 - 2² = 1224311317 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1224311293 and 1224311302.

It is not an unprimeable number, because it can be changed into a prime (1224311371) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1565225 + ... + 1566006.

It is an arithmetic number, because the mean of its divisors is an integer number (169086528).

Almost surely, 2^1224311321 is an apocalyptic number.

It is an amenable number.

1224311321 is a deficient number, since it is larger than the sum of its proper divisors (128380903).

1224311321 is a wasteful number, since it uses less digits than its factorization.

1224311321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3131271.

The product of its digits is 288, while the sum is 20.

The square root of 1224311321 is about 34990.1603454457. The cubic root of 1224311321 is about 1069.7869319830.

Adding to 1224311321 its reverse (1231134221), we get a palindrome (2455445542).

The spelling of 1224311321 in words is "one billion, two hundred twenty-four million, three hundred eleven thousand, three hundred twenty-one".