2021111101111 has 2 divisors, whose sum is σ = 2021111101112. Its totient is φ = 2021111101110.

The previous prime is 2021111101081. The next prime is 2021111101129. The reversal of 2021111101111 is 1111011111202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2021111101111 - 2⁹ = 2021111100599 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021111101091 and 2021111101100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2021111101171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010555550555 + 1010555550556.

It is an arithmetic number, because the mean of its divisors is an integer number (1010555550556).

Almost surely, 2^{2021111101111} is an apocalyptic number.

2021111101111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021111101111 is an equidigital number, since it uses as much as digits as its factorization.

2021111101111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 2021111101111 its reverse (1111011111202), we get a palindrome (3132122212313).

The spelling of 2021111101111 in words is "two trillion, twenty-one billion, one hundred eleven million, one hundred one thousand, one hundred eleven".