2022221021 has 2 divisors, whose sum is σ = 2022221022. Its totient is φ = 2022221020.

The previous prime is 2022220909. The next prime is 2022221029. The reversal of 2022221021 is 1201222202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1384658521 + 637562500 = 37211^2 + 25250^2 .

It is a cyclic number.

It is not a de Polignac number, because 2022221021 - 2³⁰ = 948479197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2022220987 and 2022221005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2022221029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1011110510 + 1011110511.

It is an arithmetic number, because the mean of its divisors is an integer number (1011110511).

Almost surely, 2^2022221021 is an apocalyptic number.

It is an amenable number.

2022221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2022221021 is an equidigital number, since it uses as much as digits as its factorization.

2022221021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2022221021 is about 44969.1118546942. Note that the first 3 decimals coincide. The cubic root of 2022221021 is about 1264.5699967970.

Adding to 2022221021 its reverse (1201222202), we get a palindrome (3223443223).

The spelling of 2022221021 in words is "two billion, twenty-two million, two hundred twenty-one thousand, twenty-one".