2221000999 has 24 divisors (see below), whose sum is σ = 2609363328. Its totient is φ = 1884844080.

The previous prime is 2221000997. The next prime is 2221001011. The reversal of 2221000999 is 9990001222.

It is not a de Polignac number, because 2221000999 - 2¹ = 2221000997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221000993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3889384 + ... + 3889954.

It is an arithmetic number, because the mean of its divisors is an integer number (108723472).

Almost surely, 2^2221000999 is an apocalyptic number.

2221000999 is a deficient number, since it is larger than the sum of its proper divisors (388362329).

2221000999 is a wasteful number, since it uses less digits than its factorization.

2221000999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1235 (or 1228 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 2221000999 is about 47127.4972707017. The cubic root of 2221000999 is about 1304.7167902231.

The spelling of 2221000999 in words is "two billion, two hundred twenty-one million, nine hundred ninety-nine", and thus it is an aban number.