220021110 has 80 divisors (see below), whose sum is σ = 605466576. Its totient is φ = 57298752.

The previous prime is 220021103. The next prime is 220021163. The reversal of 220021110 is 11120022.

220021110 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 220021092 and 220021101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 31672 + ... + 37988.

Almost surely, 2^220021110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302733288).

220021110 is an abundant number, since it is smaller than the sum of its proper divisors (385445466).

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

220021110 is a wasteful number, since it uses less digits than its factorization.

220021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6379 (or 6370 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 220021110 is about 14833.1085750762. The cubic root of 220021110 is about 603.7003817099.

Adding to 220021110 its reverse (11120022), we get a palindrome (231141132).

The spelling of 220021110 in words is "two hundred twenty million, twenty-one thousand, one hundred ten".