2102221 has 8 divisors (see below), whose sum is σ = 2306304. Its totient is φ = 1900320.

The previous prime is 2102213. The next prime is 2102249. The reversal of 2102221 is 1222012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2102221 - 2³ = 2102213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2102198 and 2102207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2025 + ... + 2881.

It is an arithmetic number, because the mean of its divisors is an integer number (288288).

2^2102221 is an apocalyptic number.

It is an amenable number.

2102221 is a deficient number, since it is larger than the sum of its proper divisors (204083).

2102221 is a wasteful number, since it uses less digits than its factorization.

2102221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 2102221 is about 1449.9037899116. The cubic root of 2102221 is about 128.1030460897.

Adding to 2102221 its reverse (1222012), we get a palindrome (3324233).

The spelling of 2102221 in words is "two million, one hundred two thousand, two hundred twenty-one".