1224133321 has 2 divisors, whose sum is σ = 1224133322. Its totient is φ = 1224133320.

The previous prime is 1224133289. The next prime is 1224133333. The reversal of 1224133321 is 1233314221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1146499600 + 77633721 = 33860^2 + 8811^2 .

It is an emirp because it is prime and its reverse (1233314221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1224133321 - 2⁵ = 1224133289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1224133292 and 1224133301.

It is not a weakly prime, because it can be changed into another prime (1224163321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612066660 + 612066661.

It is an arithmetic number, because the mean of its divisors is an integer number (612066661).

Almost surely, 2^1224133321 is an apocalyptic number.

It is an amenable number.

1224133321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224133321 is an equidigital number, since it uses as much as digits as its factorization.

1224133321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 22.

The square root of 1224133321 is about 34987.6166807629. The cubic root of 1224133321 is about 1069.7350847936.

Adding to 1224133321 its reverse (1233314221), we get a palindrome (2457447542).

Subtracting 1224133321 from its reverse (1233314221), we obtain a square (9180900 = 3030²).

The spelling of 1224133321 in words is "one billion, two hundred twenty-four million, one hundred thirty-three thousand, three hundred twenty-one".