21300031003 has 8 divisors (see below), whose sum is σ = 21757519872. Its totient is φ = 20842721256.

The previous prime is 21300031001. The next prime is 21300031007. The reversal of 21300031003 is 30013000312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21300031003 - 2¹ = 21300031001 is a prime.

It is a super-2 number, since 2×21300031003² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21300031001) 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 7 ways as a sum of consecutive naturals, for example, 211126 + ... + 295252.

It is an arithmetic number, because the mean of its divisors is an integer number (2719689984).

Almost surely, 2^21300031003 is an apocalyptic number.

21300031003 is a deficient number, since it is larger than the sum of its proper divisors (457488869).

21300031003 is an equidigital number, since it uses as much as digits as its factorization.

21300031003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89561.

The product of its (nonzero) digits is 54, while the sum is 13.

Adding to 21300031003 its reverse (30013000312), we get a palindrome (51313031315).

The spelling of 21300031003 in words is "twenty-one billion, three hundred million, thirty-one thousand, three".