21103303301 has 4 divisors (see below), whose sum is σ = 21153669600. Its totient is φ = 21052937004.

The previous prime is 21103303279. The next prime is 21103303303. The reversal of 21103303301 is 10330330112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21103303301 - 2²² = 21099108997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21103303301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103303303) 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, 25182521 + ... + 25183358.

It is an arithmetic number, because the mean of its divisors is an integer number (5288417400).

Almost surely, 2^21103303301 is an apocalyptic number.

It is an amenable number.

21103303301 is a deficient number, since it is larger than the sum of its proper divisors (50366299).

21103303301 is an equidigital number, since it uses as much as digits as its factorization.

21103303301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50366298.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21103303301 its reverse (10330330112), we get a palindrome (31433633413).

The spelling of 21103303301 in words is "twenty-one billion, one hundred three million, three hundred three thousand, three hundred one".