402243013321 has 2 divisors, whose sum is σ = 402243013322. Its totient is φ = 402243013320.

The previous prime is 402243013297. The next prime is 402243013343. The reversal of 402243013321 is 123310342204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 390548753721 + 11694259600 = 624939^2 + 108140^2 .

It is a cyclic number.

It is not a de Polignac number, because 402243013321 - 2²³ = 402234624713 is a prime.

It is not a weakly prime, because it can be changed into another prime (402243013021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201121506660 + 201121506661.

It is an arithmetic number, because the mean of its divisors is an integer number (201121506661).

Almost surely, 2^402243013321 is an apocalyptic number.

It is an amenable number.

402243013321 is a deficient number, since it is larger than the sum of its proper divisors (1).

402243013321 is an equidigital number, since it uses as much as digits as its factorization.

402243013321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 402243013321 its reverse (123310342204), we get a palindrome (525553355525).

The spelling of 402243013321 in words is "four hundred two billion, two hundred forty-three million, thirteen thousand, three hundred twenty-one".