21103203130003 has 4 divisors (see below), whose sum is σ = 21104271179680. Its totient is φ = 21102135080328.

The previous prime is 21103203129989. The next prime is 21103203130027. The reversal of 21103203130003 is 30003130230112.

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

It is a cyclic number.

It is not a de Polignac number, because 21103203130003 - 2⁴¹ = 18904179874451 is a prime.

It is a super-2 number, since 2×21103203130003² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103203130043) 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 3 ways as a sum of consecutive naturals, for example, 533995200 + ... + 534034717.

It is an arithmetic number, because the mean of its divisors is an integer number (5276067794920).

Almost surely, 2^{21103203130003} is an apocalyptic number.

21103203130003 is a deficient number, since it is larger than the sum of its proper divisors (1068049677).

21103203130003 is a wasteful number, since it uses less digits than its factorization.

21103203130003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068049676.

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

Adding to 21103203130003 its reverse (30003130230112), we get a palindrome (51106333360115).

The spelling of 21103203130003 in words is "twenty-one trillion, one hundred three billion, two hundred three million, one hundred thirty thousand, three".