2221111000 has 32 divisors (see below), whose sum is σ = 5197402080. Its totient is φ = 888444000.

The previous prime is 2221110973. The next prime is 2221111019. The reversal of 2221111000 is 1111222.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

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, 1109556 + ... + 1111555.

It is an arithmetic number, because the mean of its divisors is an integer number (162418815).

Almost surely, 2^2221111000 is an apocalyptic number.

2221111000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221111000 is an abundant number, since it is smaller than the sum of its proper divisors (2976291080).

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

2221111000 is a wasteful number, since it uses less digits than its factorization.

2221111000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2221132 (or 2221118 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 2221111000 is about 47128.6643137698. The cubic root of 2221111000 is about 1304.7383297275.

Adding to 2221111000 its reverse (1111222), we get a palindrome (2222222222).

The spelling of 2221111000 in words is "two billion, two hundred twenty-one million, one hundred eleven thousand".