21203113203003 has 32 divisors (see below), whose sum is σ = 29024058479616. Its totient is φ = 13761960081408.

The previous prime is 21203113202959. The next prime is 21203113203017. The reversal of 21203113203003 is 30030231130212.

It is not a de Polignac number, because 21203113203003 - 2²¹ = 21203111105851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21203113204003) 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 31 ways as a sum of consecutive naturals, for example, 601199176 + ... + 601234442.

It is an arithmetic number, because the mean of its divisors is an integer number (907001827488).

Almost surely, 2^{21203113203003} is an apocalyptic number.

21203113203003 is a deficient number, since it is larger than the sum of its proper divisors (7820945276613).

21203113203003 is a wasteful number, since it uses less digits than its factorization.

21203113203003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57603.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21203113203003 its reverse (30030231130212), we get a palindrome (51233344333215).

The spelling of 21203113203003 in words is "twenty-one trillion, two hundred three billion, one hundred thirteen million, two hundred three thousand, three".