11222021 has 2 divisors, whose sum is σ = 11222022. Its totient is φ = 11222020.

The previous prime is 11221993. The next prime is 11222033. The reversal of 11222021 is 12022211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6832996 + 4389025 = 2614^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 11222021 - 2¹⁰ = 11220997 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11221993 and 11222011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11222041) 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 as a sum of consecutive naturals, namely, 5611010 + 5611011.

It is an arithmetic number, because the mean of its divisors is an integer number (5611011).

Almost surely, 2^11222021 is an apocalyptic number.

It is an amenable number.

11222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11222021 is an equidigital number, since it uses as much as digits as its factorization.

11222021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 11222021 is about 3349.9285066998. The cubic root of 11222021 is about 223.8843272352.

Adding to 11222021 its reverse (12022211), we get a palindrome (23244232).

The spelling of 11222021 in words is "eleven million, two hundred twenty-two thousand, twenty-one".