21010331003 has 16 divisors (see below), whose sum is σ = 22078095360. Its totient is φ = 19969653600.

The previous prime is 21010330951. The next prime is 21010331009. The reversal of 21010331003 is 30013301012.

It is a cyclic number.

It is not a de Polignac number, because 21010331003 - 2²⁴ = 20993553787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010331009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 445301 + ... + 490217.

It is an arithmetic number, because the mean of its divisors is an integer number (1379880960).

Almost surely, 2^21010331003 is an apocalyptic number.

21010331003 is a deficient number, since it is larger than the sum of its proper divisors (1067764357).

21010331003 is a wasteful number, since it uses less digits than its factorization.

21010331003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45218.

The product of its (nonzero) digits is 54, while the sum is 14.

Adding to 21010331003 its reverse (30013301012), we get a palindrome (51023632015).

The spelling of 21010331003 in words is "twenty-one billion, ten million, three hundred thirty-one thousand, three".