21002330003 has 2 divisors, whose sum is σ = 21002330004. Its totient is φ = 21002330002.

The previous prime is 21002329993. The next prime is 21002330021. The reversal of 21002330003 is 30003320012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002330003 - 2⁴ = 21002329987 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21002330003.

It is not a weakly prime, because it can be changed into another prime (21002330203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501165001 + 10501165002.

It is an arithmetic number, because the mean of its divisors is an integer number (10501165002).

Almost surely, 2^21002330003 is an apocalyptic number.

21002330003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002330003 is an equidigital number, since it uses as much as digits as its factorization.

21002330003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 14.

Adding to 21002330003 its reverse (30003320012), we get a palindrome (51005650015).

Subtracting 21002330003 from its reverse (30003320012), we obtain a palindrome (9000990009).

The spelling of 21002330003 in words is "twenty-one billion, two million, three hundred thirty thousand, three".