21103000331003 has 4 divisors (see below), whose sum is σ = 21103009718448. Its totient is φ = 21102990943560.

The previous prime is 21103000330969. The next prime is 21103000331009. The reversal of 21103000331003 is 30013300030112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21103000331003 - 2⁶ = 21103000330939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21103000331009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901850 + ... + 6558912.

It is an arithmetic number, because the mean of its divisors is an integer number (5275752429612).

Almost surely, 2^{21103000331003} is an apocalyptic number.

21103000331003 is a deficient number, since it is larger than the sum of its proper divisors (9387445).

21103000331003 is an equidigital number, since it uses as much as digits as its factorization.

21103000331003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9387444.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21103000331003 its reverse (30013300030112), we get a palindrome (51116300361115).

The spelling of 21103000331003 in words is "twenty-one trillion, one hundred three billion, three hundred thirty-one thousand, three".