210221220222 has 24 divisors (see below), whose sum is σ = 490516181064. Its totient is φ = 64683452304.

The previous prime is 210221220217. The next prime is 210221220257. The reversal of 210221220222 is 222022122012.

210221220222 is a `hidden beast` number, since 2 + 1 + 0 + 221 + 220 + 222 = 666.

It is a super-2 number, since 2×210221220222² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 210221220195 and 210221220204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 449190408 + ... + 449190875.

It is an arithmetic number, because the mean of its divisors is an integer number (20438174211).

Almost surely, 2^210221220222 is an apocalyptic number.

210221220222 is an abundant number, since it is smaller than the sum of its proper divisors (280294960842).

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

210221220222 is a wasteful number, since it uses less digits than its factorization.

210221220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898381304 (or 898381301 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 210221220222 its reverse (222022122012), we get a palindrome (432243342234).

The spelling of 210221220222 in words is "two hundred ten billion, two hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".