210000221221220 has 24 divisors (see below), whose sum is σ = 441001995633024. Its totient is φ = 83999796856416.

The previous prime is 210000221221213. The next prime is 210000221221253. The reversal of 210000221221220 is 22122122000012.

It is a happy number.

It is a super-2 number, since 2×210000221221220² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12274892 + ... + 23888771.

It is an arithmetic number, because the mean of its divisors is an integer number (18375083151376).

Almost surely, 2^{210000221221220} is an apocalyptic number.

210000221221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

210000221221220 is an abundant number, since it is smaller than the sum of its proper divisors (231001774411804).

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

210000221221220 is a wasteful number, since it uses less digits than its factorization.

210000221221220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36454019 (or 36454017 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 210000221221220 its reverse (22122122000012), we get a palindrome (232122343221232).

The spelling of 210000221221220 in words is "two hundred ten trillion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred twenty".