21011000003 has 32 divisors (see below), whose sum is σ = 24842695680. Its totient is φ = 17400240000.

The previous prime is 21010999993. The next prime is 21011000051. The reversal of 21011000003 is 30000011012.

It is a cyclic number.

It is not a de Polignac number, because 21011000003 - 2¹⁴ = 21010983619 is a prime.

It is a super-2 number, since 2×21011000003² (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 (21011000303) 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 31 ways as a sum of consecutive naturals, for example, 5647778 + ... + 5651496.

It is an arithmetic number, because the mean of its divisors is an integer number (776334240).

Almost surely, 2^21011000003 is an apocalyptic number.

21011000003 is a deficient number, since it is larger than the sum of its proper divisors (3831695677).

21011000003 is a wasteful number, since it uses less digits than its factorization.

21011000003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4019.

The product of its (nonzero) digits is 6, while the sum is 8.

Adding to 21011000003 its reverse (30000011012), we get a palindrome (51011011015).

The spelling of 21011000003 in words is "twenty-one billion, eleven million, three", and thus it is an aban number and an uban number.