221110021120 has 88 divisors (see below), whose sum is σ = 534278201184. Its totient is φ = 87798153216.

The previous prime is 221110021109. The next prime is 221110021151. The reversal of 221110021120 is 21120011122.

It is a self number, because there is not a number n which added to its sum of digits gives 221110021120.

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, 543829 + ... + 859051.

Almost surely, 2^221110021120 is an apocalyptic number.

221110021120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221110021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267139100592).

221110021120 is an abundant number, since it is smaller than the sum of its proper divisors (313168180064).

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

221110021120 is a wasteful number, since it uses less digits than its factorization.

221110021120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315385 (or 315367 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221110021120 its reverse (21120011122), we get a palindrome (242230032242).

The spelling of 221110021120 in words is "two hundred twenty-one billion, one hundred ten million, twenty-one thousand, one hundred twenty".