2021220211 has 2 divisors, whose sum is σ = 2021220212. Its totient is φ = 2021220210.

The previous prime is 2021220193. The next prime is 2021220239. The reversal of 2021220211 is 1120221202.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021220211 - 2²⁹ = 1484349299 is a prime.

It is a super-2 number, since 2×2021220211² = 8170662282709769042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2021220191 and 2021220200.

It is not a weakly prime, because it can be changed into another prime (2021220241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010610105 + 1010610106.

It is an arithmetic number, because the mean of its divisors is an integer number (1010610106).

Almost surely, 2^2021220211 is an apocalyptic number.

2021220211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021220211 is an equidigital number, since it uses as much as digits as its factorization.

2021220211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 2021220211 is about 44957.9827283209. The cubic root of 2021220211 is about 1264.3613478039.

Adding to 2021220211 its reverse (1120221202), we get a palindrome (3141441413).

Subtracting from 2021220211 its reverse (1120221202), we obtain a palindrome (900999009).

The spelling of 2021220211 in words is "two billion, twenty-one million, two hundred twenty thousand, two hundred eleven".