2210021 has 8 divisors (see below), whose sum is σ = 2489088. Its totient is φ = 1944000.

The previous prime is 2210011. The next prime is 2210027. The reversal of 2210021 is 1200122.

2210021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2210021 - 2⁶ = 2209957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2209990 and 2210008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2900 + ... + 3581.

It is an arithmetic number, because the mean of its divisors is an integer number (311136).

2^2210021 is an apocalyptic number.

It is an amenable number.

2210021 is a deficient number, since it is larger than the sum of its proper divisors (279067).

2210021 is a wasteful number, since it uses less digits than its factorization.

2210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6523.

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

The square root of 2210021 is about 1486.6139377794. The cubic root of 2210021 is about 130.2563187462.

Adding to 2210021 its reverse (1200122), we get a palindrome (3410143).

The spelling of 2210021 in words is "two million, two hundred ten thousand, twenty-one".