221000221021110 has 96 divisors (see below), whose sum is σ = 549348330286080. Its totient is φ = 56898363156096.

The previous prime is 221000221021061. The next prime is 221000221021157. The reversal of 221000221021110 is 11120122000122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221000221021110.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 530201961 + ... + 530618619.

It is an arithmetic number, because the mean of its divisors is an integer number (5722378440480).

Almost surely, 2^{221000221021110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221000221021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274674165143040).

221000221021110 is an abundant number, since it is smaller than the sum of its proper divisors (328348109264970).

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

221000221021110 is a wasteful number, since it uses less digits than its factorization.

221000221021110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437750 (or 437721 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221000221021110 its reverse (11120122000122), we get a palindrome (232120343021232).

The spelling of 221000221021110 in words is "two hundred twenty-one trillion, two hundred twenty-one million, twenty-one thousand, one hundred ten".