21303001312 has 24 divisors (see below), whose sum is σ = 42530996592. Its totient is φ = 10501478400.

The previous prime is 21303001289. The next prime is 21303001319. The reversal of 21303001312 is 21310030312.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21303001319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4685889 + ... + 4690432.

It is an arithmetic number, because the mean of its divisors is an integer number (1772124858).

Almost surely, 2^21303001312 is an apocalyptic number.

It is an amenable number.

21303001312 is a deficient number, since it is larger than the sum of its proper divisors (21227995280).

21303001312 is an equidigital number, since it uses as much as digits as its factorization.

21303001312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9376402 (or 9376394 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21303001312 its reverse (21310030312), we get a palindrome (42613031624).

The spelling of 21303001312 in words is "twenty-one billion, three hundred three million, one thousand, three hundred twelve".