21030112303 has 4 divisors (see below), whose sum is σ = 21030455320. Its totient is φ = 21029769288.

The previous prime is 21030112277. The next prime is 21030112331. The reversal of 21030112303 is 30321103012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21030112303 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 (21030112343) 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, 51600 + ... + 211477.

It is an arithmetic number, because the mean of its divisors is an integer number (5257613830).

Almost surely, 2^21030112303 is an apocalyptic number.

21030112303 is a deficient number, since it is larger than the sum of its proper divisors (343017).

21030112303 is an equidigital number, since it uses as much as digits as its factorization.

21030112303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343016.

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

Adding to 21030112303 its reverse (30321103012), we get a palindrome (51351215315).

The spelling of 21030112303 in words is "twenty-one billion, thirty million, one hundred twelve thousand, three hundred three".