421005313303 has 4 divisors (see below), whose sum is σ = 424867747480. Its totient is φ = 417142879128.

The previous prime is 421005313291. The next prime is 421005313349. The reversal of 421005313303 is 303313500124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421005313303 - 2¹⁷ = 421005182231 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 (421005313103) 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 in 3 ways as a sum of consecutive naturals, for example, 1931216925 + ... + 1931217142.

It is an arithmetic number, because the mean of its divisors is an integer number (106216936870).

Almost surely, 2^421005313303 is an apocalyptic number.

421005313303 is a deficient number, since it is larger than the sum of its proper divisors (3862434177).

421005313303 is a wasteful number, since it uses less digits than its factorization.

421005313303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3862434176.

The product of its (nonzero) digits is 3240, while the sum is 25.

Adding to 421005313303 its reverse (303313500124), we get a palindrome (724318813427).

The spelling of 421005313303 in words is "four hundred twenty-one billion, five million, three hundred thirteen thousand, three hundred three".