210223210021 has 12 divisors (see below), whose sum is σ = 233359645932. Its totient is φ = 189219800000.

The previous prime is 210223209983. The next prime is 210223210031. The reversal of 210223210021 is 120012322012.

It is a happy number.

210223210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 165380488900 + 44842721121 = 406670^2 + 211761^2 .

It is not a de Polignac number, because 210223210021 - 2⁹ = 210223209509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210223209977 and 210223210004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210223210031) 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 11 ways as a sum of consecutive naturals, for example, 8588680 + ... + 8613121.

It is an arithmetic number, because the mean of its divisors is an integer number (19446637161).

Almost surely, 2^210223210021 is an apocalyptic number.

It is an amenable number.

210223210021 is a deficient number, since it is larger than the sum of its proper divisors (23136435911).

210223210021 is a wasteful number, since it uses less digits than its factorization.

210223210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17201924 (or 17201913 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 210223210021 its reverse (120012322012), we get a palindrome (330235532033).

The spelling of 210223210021 in words is "two hundred ten billion, two hundred twenty-three million, two hundred ten thousand, twenty-one".