1002423221 has 2 divisors, whose sum is σ = 1002423222. Its totient is φ = 1002423220.

The previous prime is 1002423209. The next prime is 1002423269. The reversal of 1002423221 is 1223242001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 863536996 + 138886225 = 29386^2 + 11785^2 .

It is an emirp because it is prime and its reverse (1223242001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1002423221 - 2¹⁸ = 1002161077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1002423221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1002423281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 501211610 + 501211611.

It is an arithmetic number, because the mean of its divisors is an integer number (501211611).

Almost surely, 2^1002423221 is an apocalyptic number.

It is an amenable number.

1002423221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1002423221 is an equidigital number, since it uses as much as digits as its factorization.

1002423221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1002423221 is about 31661.0679068158. The cubic root of 1002423221 is about 1000.8070887658.

Adding to 1002423221 its reverse (1223242001), we get a palindrome (2225665222).

The spelling of 1002423221 in words is "one billion, two million, four hundred twenty-three thousand, two hundred twenty-one".