1021222 has 4 divisors (see below), whose sum is σ = 1531836. Its totient is φ = 510610.

The previous prime is 1021217. The next prime is 1021243. The reversal of 1021222 is 2221201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2221201 = 163 ⋅13627.

It is a junction number, because it is equal to n+sod(n) for n = 1021199 and 1021208.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 255304 + ... + 255307.

It is an arithmetic number, because the mean of its divisors is an integer number (382959).

2^1021222 is an apocalyptic number.

1021222 is a deficient number, since it is larger than the sum of its proper divisors (510614).

1021222 is an equidigital number, since it uses as much as digits as its factorization.

1021222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510613.

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

The square root of 1021222 is about 1010.5552928959. Note that the first 3 decimals coincide. The cubic root of 1021222 is about 100.7024540294.

Adding to 1021222 its reverse (2221201), we get a palindrome (3242423).

The spelling of 1021222 in words is "one million, twenty-one thousand, two hundred twenty-two".