21030210223 has 8 divisors (see below), whose sum is σ = 22943151360. Its totient is φ = 19117453080.

The previous prime is 21030210199. The next prime is 21030210259. The reversal of 21030210223 is 32201203012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-21030210223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21030210197 and 21030210206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030210023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318868 + ... + 379126.

It is an arithmetic number, because the mean of its divisors is an integer number (2867893920).

Almost surely, 2^21030210223 is an apocalyptic number.

21030210223 is a deficient number, since it is larger than the sum of its proper divisors (1912941137).

21030210223 is a wasteful number, since it uses less digits than its factorization.

21030210223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91997.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21030210223 its reverse (32201203012), we get a palindrome (53231413235).

The spelling of 21030210223 in words is "twenty-one billion, thirty million, two hundred ten thousand, two hundred twenty-three".