2822121 has 10 divisors (see below), whose sum is σ = 4215882. Its totient is φ = 1881360.

The previous prime is 2822093. The next prime is 2822129. The reversal of 2822121 is 1212282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1946025 + 876096 = 1395^2 + 936^2 .

It is not a de Polignac number, because 2822121 - 2¹⁰ = 2821097 is a prime.

2822121 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2822094 and 2822103.

It is not an unprimeable number, because it can be changed into a prime (2822129) 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 9 ways as a sum of consecutive naturals, for example, 17340 + ... + 17501.

2^2822121 is an apocalyptic number.

It is an amenable number.

2822121 is a deficient number, since it is larger than the sum of its proper divisors (1393761).

2822121 is an equidigital number, since it uses as much as digits as its factorization.

2822121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34853 (or 34844 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 2822121 is about 1679.9169622336. The cubic root of 2822121 is about 141.3161759511.

The spelling of 2822121 in words is "two million, eight hundred twenty-two thousand, one hundred twenty-one".