2021222111 has 2 divisors, whose sum is σ = 2021222112. Its totient is φ = 2021222110.

The previous prime is 2021222087. The next prime is 2021222149. The reversal of 2021222111 is 1112221202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2021222111 - 2¹⁰ = 2021221087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021222011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010611055 + 1010611056.

It is an arithmetic number, because the mean of its divisors is an integer number (1010611056).

Almost surely, 2^2021222111 is an apocalyptic number.

2021222111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021222111 is an equidigital number, since it uses as much as digits as its factorization.

2021222111 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 14.

The square root of 2021222111 is about 44958.0038591573. The cubic root of 2021222111 is about 1264.3617439814.

Adding to 2021222111 its reverse (1112221202), we get a palindrome (3133443313).

Subtracting from 2021222111 its reverse (1112221202), we obtain a palindrome (909000909).

The spelling of 2021222111 in words is "two billion, twenty-one million, two hundred twenty-two thousand, one hundred eleven".