21013230003 has 4 divisors (see below), whose sum is σ = 28017640008. Its totient is φ = 14008820000.

The previous prime is 21013229983. The next prime is 21013230011. The reversal of 21013230003 is 30003231012.

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 21013230003 - 2¹⁴ = 21013213619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21013230023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3502204998 + ... + 3502205003.

It is an arithmetic number, because the mean of its divisors is an integer number (7004410002).

Almost surely, 2^21013230003 is an apocalyptic number.

21013230003 is a deficient number, since it is larger than the sum of its proper divisors (7004410005).

21013230003 is an equidigital number, since it uses as much as digits as its factorization.

21013230003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7004410004.

The product of its (nonzero) digits is 108, while the sum is 15.

Adding to 21013230003 its reverse (30003231012), we get a palindrome (51016461015).

The spelling of 21013230003 in words is "twenty-one billion, thirteen million, two hundred thirty thousand, three".