210221110020220 has 48 divisors (see below), whose sum is σ = 475439523713280. Its totient is φ = 77617424941056.

The previous prime is 210221110020133. The next prime is 210221110020223. The reversal of 210221110020220 is 22020011122012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 210221110020194 and 210221110020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210221110020223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6383365 + ... + 21475324.

It is an arithmetic number, because the mean of its divisors is an integer number (9904990077360).

Almost surely, 2^{210221110020220} is an apocalyptic number.

210221110020220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221110020220 is an abundant number, since it is smaller than the sum of its proper divisors (265218413693060).

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

210221110020220 is a wasteful number, since it uses less digits than its factorization.

210221110020220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27887734 (or 27887732 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 210221110020220 its reverse (22020011122012), we get a palindrome (232241121142232).

The spelling of 210221110020220 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred ten million, twenty thousand, two hundred twenty".