2223021 has 4 divisors (see below), whose sum is σ = 2964032. Its totient is φ = 1482012.

The previous prime is 2223007. The next prime is 2223031. The reversal of 2223021 is 1203222.

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 not a de Polignac number, because 2223021 - 2⁷ = 2222893 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222988 and 2223006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223031) 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 3 ways as a sum of consecutive naturals, for example, 370501 + ... + 370506.

It is an arithmetic number, because the mean of its divisors is an integer number (741008).

2^2223021 is an apocalyptic number.

It is an amenable number.

2223021 is a deficient number, since it is larger than the sum of its proper divisors (741011).

2223021 is an equidigital number, since it uses as much as digits as its factorization.

2223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741010.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 2223021 is about 1490.9798791399. The cubic root of 2223021 is about 130.5112217123.

Adding to 2223021 its reverse (1203222), we get a palindrome (3426243).

The spelling of 2223021 in words is "two million, two hundred twenty-three thousand, twenty-one".