21220230303 has 12 divisors (see below), whose sum is σ = 30657851328. Its totient is φ = 14143862880.

The previous prime is 21220230299. The next prime is 21220230341. The reversal of 21220230303 is 30303202212.

It is a happy number.

It is not a de Polignac number, because 21220230303 - 2² = 21220230299 is a prime.

It is a super-2 number, since 2×21220230303² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220230373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 200550 + ... + 287507.

It is an arithmetic number, because the mean of its divisors is an integer number (2554820944).

Almost surely, 2^21220230303 is an apocalyptic number.

21220230303 is a deficient number, since it is larger than the sum of its proper divisors (9437621025).

21220230303 is a wasteful number, since it uses less digits than its factorization.

21220230303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492894 (or 492891 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

Adding to 21220230303 its reverse (30303202212), we get a palindrome (51523432515).

The spelling of 21220230303 in words is "twenty-one billion, two hundred twenty million, two hundred thirty thousand, three hundred three".