2107221 has 4 divisors (see below), whose sum is σ = 2809632. Its totient is φ = 1404812.

The previous prime is 2107207. The next prime is 2107223. The reversal of 2107221 is 1227012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2107221 - 2¹⁰ = 2106197 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2107221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2107223) 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, 351201 + ... + 351206.

It is an arithmetic number, because the mean of its divisors is an integer number (702408).

2^2107221 is an apocalyptic number.

It is an amenable number.

2107221 is a deficient number, since it is larger than the sum of its proper divisors (702411).

2107221 is an equidigital number, since it uses as much as digits as its factorization.

2107221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702410.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 2107221 is about 1451.6270182109. The cubic root of 2107221 is about 128.2045273473.

The spelling of 2107221 in words is "two million, one hundred seven thousand, two hundred twenty-one".