1002223001321 has 2 divisors, whose sum is σ = 1002223001322. Its totient is φ = 1002223001320.

The previous prime is 1002223001317. The next prime is 1002223001333. The reversal of 1002223001321 is 1231003222001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999178168921 + 3044832400 = 999589^2 + 55180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002223001321 - 2² = 1002223001317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1002223001321.

It is not a weakly prime, because it can be changed into another prime (1002223001341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501111500660 + 501111500661.

It is an arithmetic number, because the mean of its divisors is an integer number (501111500661).

Almost surely, 2^{1002223001321} is an apocalyptic number.

It is an amenable number.

1002223001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002223001321 is an equidigital number, since it uses as much as digits as its factorization.

1002223001321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1002223001321 its reverse (1231003222001), we get a palindrome (2233226223322).

The spelling of 1002223001321 in words is "one trillion, two billion, two hundred twenty-three million, one thousand, three hundred twenty-one".