421000443001303 has 16 divisors (see below), whose sum is σ = 466400287745280. Its totient is φ = 379974238774680.

The previous prime is 421000443001291. The next prime is 421000443001321. The reversal of 421000443001303 is 303100344000124.

It is not a de Polignac number, because 421000443001303 - 2²¹ = 421000440904151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421000443011303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1137598675 + ... + 1137968692.

It is an arithmetic number, because the mean of its divisors is an integer number (29150017984080).

Almost surely, 2^{421000443001303} is an apocalyptic number.

421000443001303 is a deficient number, since it is larger than the sum of its proper divisors (45399844743977).

421000443001303 is a wasteful number, since it uses less digits than its factorization.

421000443001303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2275567539 (or 2275567517 counting only the distinct ones).

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

Adding to 421000443001303 its reverse (303100344000124), we get a palindrome (724100787001427).

The spelling of 421000443001303 in words is "four hundred twenty-one trillion, four hundred forty-three million, one thousand, three hundred three".