21023330203 has 2 divisors, whose sum is σ = 21023330204. Its totient is φ = 21023330202.

The previous prime is 21023330183. The next prime is 21023330227. The reversal of 21023330203 is 30203332012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21023330203 - 2²⁹ = 20486459291 is a prime.

It is not a weakly prime, because it can be changed into another prime (21023330243) 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 as a sum of consecutive naturals, namely, 10511665101 + 10511665102.

It is an arithmetic number, because the mean of its divisors is an integer number (10511665102).

Almost surely, 2^21023330203 is an apocalyptic number.

21023330203 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023330203 is an equidigital number, since it uses as much as digits as its factorization.

21023330203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 21023330203 its reverse (30203332012), we get a palindrome (51226662215).

The spelling of 21023330203 in words is "twenty-one billion, twenty-three million, three hundred thirty thousand, two hundred three".