221010112102110 has 128 divisors (see below), whose sum is σ = 549389298608640. Its totient is φ = 56856943858176.

The previous prime is 221010112102099. The next prime is 221010112102177. The reversal of 221010112102110 is 11201211010122.

It is a happy number.

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 221010112102110.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 118339629 + ... + 120192711.

It is an arithmetic number, because the mean of its divisors is an integer number (4292103895380).

Almost surely, 2^{221010112102110} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221010112102110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274694649304320).

221010112102110 is an abundant number, since it is smaller than the sum of its proper divisors (328379186506530).

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

221010112102110 is a wasteful number, since it uses less digits than its factorization.

221010112102110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1854042.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221010112102110 its reverse (11201211010122), we get a palindrome (232211323112232).

The spelling of 221010112102110 in words is "two hundred twenty-one trillion, ten billion, one hundred twelve million, one hundred two thousand, one hundred ten".