210021110220 has 192 divisors, whose sum is σ = 611536859136. Its totient is φ = 53816555520.

The previous prime is 210021110209. The next prime is 210021110227. The reversal of 210021110220 is 22011120012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 210021110196 and 210021110205.

It is not an unprimeable number, because it can be changed into a prime (210021110227) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 161182089 + ... + 161183391.

It is an arithmetic number, because the mean of its divisors is an integer number (3185087808).

Almost surely, 2^210021110220 is an apocalyptic number.

210021110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210021110220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (305768429568).

210021110220 is an abundant number, since it is smaller than the sum of its proper divisors (401515748916).

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

210021110220 is a wasteful number, since it uses less digits than its factorization.

210021110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2360 (or 2358 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210021110220 its reverse (22011120012), we get a palindrome (232032230232).

The spelling of 210021110220 in words is "two hundred ten billion, twenty-one million, one hundred ten thousand, two hundred twenty".