2213021 has 4 divisors (see below), whose sum is σ = 2219100. Its totient is φ = 2206944.

The previous prime is 2212979. The next prime is 2213033. The reversal of 2213021 is 1203122.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1428025 + 784996 = 1195^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 2213021 - 2¹⁰ = 2211997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212993 and 2213011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2216021) 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, 2456 + ... + 3233.

It is an arithmetic number, because the mean of its divisors is an integer number (554775).

2^2213021 is an apocalyptic number.

It is an amenable number.

2213021 is a deficient number, since it is larger than the sum of its proper divisors (6079).

2213021 is an equidigital number, since it uses as much as digits as its factorization.

2213021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6078.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2213021 is about 1487.6225999897. The cubic root of 2213021 is about 130.3152310480.

Adding to 2213021 its reverse (1203122), we get a palindrome (3416143).

The spelling of 2213021 in words is "two million, two hundred thirteen thousand, twenty-one".