2221021110 has 128 divisors (see below), whose sum is σ = 6660403200. Its totient is φ = 460494720.

The previous prime is 2221021087. The next prime is 2221021129. The reversal of 2221021110 is 111201222.

It is a Curzon number.

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, 1521561 + ... + 1523019.

It is an arithmetic number, because the mean of its divisors is an integer number (52034400).

Almost surely, 2^2221021110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221021110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3330201600).

2221021110 is an abundant number, since it is smaller than the sum of its proper divisors (4439382090).

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

2221021110 is a wasteful number, since it uses less digits than its factorization.

2221021110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 2221021110 is about 47127.7106382222. The cubic root of 2221021110 is about 1304.7207282493.

Adding to 2221021110 its reverse (111201222), we get a palindrome (2332222332).

The spelling of 2221021110 in words is "two billion, two hundred twenty-one million, twenty-one thousand, one hundred ten".