21223030303 has 2 divisors, whose sum is σ = 21223030304. Its totient is φ = 21223030302.

The previous prime is 21223030277. The next prime is 21223030321. The reversal of 21223030303 is 30303032212.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21223030303 - 2³³ = 12633095711 is a prime.

21223030303 is a modest number, since divided by 30303 gives 21223 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21223030393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611515151 + 10611515152.

It is an arithmetic number, because the mean of its divisors is an integer number (10611515152).

Almost surely, 2^21223030303 is an apocalyptic number.

21223030303 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223030303 is an equidigital number, since it uses as much as digits as its factorization.

21223030303 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 21223030303 its reverse (30303032212), we get a palindrome (51526062515).

The spelling of 21223030303 in words is "twenty-one billion, two hundred twenty-three million, thirty thousand, three hundred three".