21120313303 has 6 divisors (see below), whose sum is σ = 22290414144. Its totient is φ = 20008717524.

The previous prime is 21120313241. The next prime is 21120313321. The reversal of 21120313303 is 30331302112.

It is not a de Polignac number, because 21120313303 - 2²⁵ = 21086758871 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120343303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29252151 + ... + 29252872.

It is an arithmetic number, because the mean of its divisors is an integer number (3715069024).

Almost surely, 2^21120313303 is an apocalyptic number.

21120313303 is a deficient number, since it is larger than the sum of its proper divisors (1170100841).

21120313303 is an equidigital number, since it uses as much as digits as its factorization.

21120313303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58505061 (or 58505042 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21120313303 its reverse (30331302112), we get a palindrome (51451615415).

The spelling of 21120313303 in words is "twenty-one billion, one hundred twenty million, three hundred thirteen thousand, three hundred three".