210221220222220 has 24 divisors (see below), whose sum is σ = 460658673879264. Its totient is φ = 80432466867456.

The previous prime is 210221220222193. The next prime is 210221220222263. The reversal of 210221220222220 is 22222022122012.

It is a super-2 number, since 2×210221220222220² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 210221220222191 and 210221220222200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228501325869 + ... + 228501326788.

It is an arithmetic number, because the mean of its divisors is an integer number (19194111411636).

Almost surely, 2^{210221220222220} is an apocalyptic number.

210221220222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210221220222220 is an abundant number, since it is smaller than the sum of its proper divisors (250437453657044).

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

210221220222220 is a wasteful number, since it uses less digits than its factorization.

210221220222220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457002652689 (or 457002652687 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 210221220222220 its reverse (22222022122012), we get a palindrome (232443242344232).

The spelling of 210221220222220 in words is "two hundred ten trillion, two hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twenty".