420445221210503 has 2 divisors, whose sum is σ = 420445221210504. Its totient is φ = 420445221210502.

The previous prime is 420445221210479. The next prime is 420445221210541. The reversal of 420445221210503 is 305012122544024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420445221210503 - 2¹⁶ = 420445221144967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420445221212503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210222610605251 + 210222610605252.

It is an arithmetic number, because the mean of its divisors is an integer number (210222610605252).

Almost surely, 2^{420445221210503} is an apocalyptic number.

420445221210503 is a deficient number, since it is larger than the sum of its proper divisors (1).

420445221210503 is an equidigital number, since it uses as much as digits as its factorization.

420445221210503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 420445221210503 its reverse (305012122544024), we get a palindrome (725457343754527).

The spelling of 420445221210503 in words is "four hundred twenty trillion, four hundred forty-five billion, two hundred twenty-one million, two hundred ten thousand, five hundred three".