21010030223 has 48 divisors (see below), whose sum is σ = 26742856896. Its totient is φ = 16358630400.

The previous prime is 21010030189. The next prime is 21010030259. The reversal of 21010030223 is 32203001012.

It is a happy number.

It is not a de Polignac number, because 21010030223 - 2⁸ = 21010029967 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21010030198 and 21010030207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010030123) 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 in 47 ways as a sum of consecutive naturals, for example, 10868165 + ... + 10870097.

It is an arithmetic number, because the mean of its divisors is an integer number (557142852).

Almost surely, 2^21010030223 is an apocalyptic number.

21010030223 is a deficient number, since it is larger than the sum of its proper divisors (5732826673).

21010030223 is a wasteful number, since it uses less digits than its factorization.

21010030223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2224 (or 2217 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21010030223 its reverse (32203001012), we get a palindrome (53213031235).

The spelling of 21010030223 in words is "twenty-one billion, ten million, thirty thousand, two hundred twenty-three".