2221111120 has 20 divisors (see below), whose sum is σ = 5164083540. Its totient is φ = 888444416.

The previous prime is 2221111103. The next prime is 2221111129. The reversal of 2221111120 is 211111222.

It can be written as a sum of positive squares in 2 ways, for example, as 689797696 + 1531313424 = 26264^2 + 39132^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 2221111120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221111129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13881865 + ... + 13882024.

It is an arithmetic number, because the mean of its divisors is an integer number (258204177).

Almost surely, 2^2221111120 is an apocalyptic number.

2221111120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221111120 is an abundant number, since it is smaller than the sum of its proper divisors (2942972420).

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

2221111120 is a wasteful number, since it uses less digits than its factorization.

2221111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27763902 (or 27763896 counting only the distinct ones).

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

The square root of 2221111120 is about 47128.6655868803. The cubic root of 2221111120 is about 1304.7383532246.

Adding to 2221111120 its reverse (211111222), we get a palindrome (2432222342).

It can be divided in two parts, 2 and 221111120, that added together give a palindrome (221111122).

The spelling of 2221111120 in words is "two billion, two hundred twenty-one million, one hundred eleven thousand, one hundred twenty".