21210203332230 has 384 divisors, whose sum is σ = 60667873136640. Its totient is φ = 4726348704000.

The previous prime is 21210203332193. The next prime is 21210203332319. The reversal of 21210203332230 is 3223330201212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210203332230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 447798529 + ... + 447845891.

It is an arithmetic number, because the mean of its divisors is an integer number (157989252960).

Almost surely, 2^{21210203332230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21210203332230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30333936568320).

21210203332230 is an abundant number, since it is smaller than the sum of its proper divisors (39457669804410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210203332230 is a wasteful number, since it uses less digits than its factorization.

21210203332230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47608 (or 47597 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 21210203332230 its reverse (3223330201212), we get a palindrome (24433533533442).

The spelling of 21210203332230 in words is "twenty-one trillion, two hundred ten billion, two hundred three million, three hundred thirty-two thousand, two hundred thirty".