2021222002021 has 2 divisors, whose sum is σ = 2021222002022. Its totient is φ = 2021222002020.

The previous prime is 2021222001961. The next prime is 2021222002027. The reversal of 2021222002021 is 1202002221202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1888934128225 + 132287873796 = 1374385^2 + 363714^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021222002021 - 2⁷ = 2021222001893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021222001986 and 2021222002004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021222002027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010611001010 + 1010611001011.

It is an arithmetic number, because the mean of its divisors is an integer number (1010611001011).

Almost surely, 2^{2021222002021} is an apocalyptic number.

It is an amenable number.

2021222002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021222002021 is an equidigital number, since it uses as much as digits as its factorization.

2021222002021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 2021222002021 its reverse (1202002221202), we get a palindrome (3223224223223).

The spelling of 2021222002021 in words is "two trillion, twenty-one billion, two hundred twenty-two million, two thousand, twenty-one".