21030030223 has 2 divisors, whose sum is σ = 21030030224. Its totient is φ = 21030030222.

The previous prime is 21030030199. The next prime is 21030030227. The reversal of 21030030223 is 32203003012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21030030223 - 2¹³ = 21030022031 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21030030197 and 21030030206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21030030227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515015111 + 10515015112.

It is an arithmetic number, because the mean of its divisors is an integer number (10515015112).

Almost surely, 2^21030030223 is an apocalyptic number.

21030030223 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030030223 is an equidigital number, since it uses as much as digits as its factorization.

21030030223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 16.

Adding to 21030030223 its reverse (32203003012), we get a palindrome (53233033235).

The spelling of 21030030223 in words is "twenty-one billion, thirty million, thirty thousand, two hundred twenty-three".