630503642221 has 2 divisors, whose sum is σ = 630503642222. Its totient is φ = 630503642220.

The previous prime is 630503642213. The next prime is 630503642227. The reversal of 630503642221 is 122246305036.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 600840469321 + 29663172900 = 775139^2 + 172230^2 .

It is a cyclic number.

It is not a de Polignac number, because 630503642221 - 2³ = 630503642213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (630503642227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315251821110 + 315251821111.

It is an arithmetic number, because the mean of its divisors is an integer number (315251821111).

Almost surely, 2^630503642221 is an apocalyptic number.

It is an amenable number.

630503642221 is a deficient number, since it is larger than the sum of its proper divisors (1).

630503642221 is an equidigital number, since it uses as much as digits as its factorization.

630503642221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 630503642221 its reverse (122246305036), we get a palindrome (752749947257).

The spelling of 630503642221 in words is "six hundred thirty billion, five hundred three million, six hundred forty-two thousand, two hundred twenty-one".