21303103031003 has 16 divisors (see below), whose sum is σ = 21867189442560. Its totient is φ = 20742233757504.

The previous prime is 21303103030997. The next prime is 21303103031027. The reversal of 21303103031003 is 30013030130312.

It is a cyclic number.

It is not a de Polignac number, because 21303103031003 - 2²⁰ = 21303101982427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21303103030003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18095183 + ... + 19236471.

It is an arithmetic number, because the mean of its divisors is an integer number (1366699340160).

Almost surely, 2^{21303103031003} is an apocalyptic number.

21303103031003 is a deficient number, since it is larger than the sum of its proper divisors (564086411557).

21303103031003 is a wasteful number, since it uses less digits than its factorization.

21303103031003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142698.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21303103031003 its reverse (30013030130312), we get a palindrome (51316133161315).

The spelling of 21303103031003 in words is "twenty-one trillion, three hundred three billion, one hundred three million, thirty-one thousand, three".