2221099 has 4 divisors (see below), whose sum is σ = 2230200. Its totient is φ = 2212000.

The previous prime is 2221097. The next prime is 2221111. The reversal of 2221099 is 9901222.

2221099 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9901222 = 2 ⋅4950611.

It is a cyclic number.

It is not a de Polignac number, because 2221099 - 2¹ = 2221097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221097) 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, 4174 + ... + 4675.

It is an arithmetic number, because the mean of its divisors is an integer number (557550).

2^2221099 is an apocalyptic number.

2221099 is a deficient number, since it is larger than the sum of its proper divisors (9101).

2221099 is an equidigital number, since it uses as much as digits as its factorization.

2221099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9100.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2221099 is about 1490.3351971956. The cubic root of 2221099 is about 130.4735980019.

The spelling of 2221099 in words is "two million, two hundred twenty-one thousand, ninety-nine".