1221344002322 has 4 divisors (see below), whose sum is σ = 1832016003486. Its totient is φ = 610672001160.

The previous prime is 1221344002321. The next prime is 1221344002349. The reversal of 1221344002322 is 2232004431221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1200144351121 + 21199651201 = 1095511^2 + 145601^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1221344002291 and 1221344002300.

It is not an unprimeable number, because it can be changed into a prime (1221344002321) 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 as a sum of consecutive naturals, namely, 305336000579 + ... + 305336000582.

Almost surely, 2^{1221344002322} is an apocalyptic number.

1221344002322 is a deficient number, since it is larger than the sum of its proper divisors (610672001164).

1221344002322 is an equidigital number, since it uses as much as digits as its factorization.

1221344002322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610672001163.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 1221344002322 its reverse (2232004431221), we get a palindrome (3453348433543).

The spelling of 1221344002322 in words is "one trillion, two hundred twenty-one billion, three hundred forty-four million, two thousand, three hundred twenty-two".