2100211111 has 2 divisors, whose sum is σ = 2100211112. Its totient is φ = 2100211110.

The previous prime is 2100211081. The next prime is 2100211159. The reversal of 2100211111 is 1111120012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2100211111 - 2¹¹ = 2100209063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2100211171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050105555 + 1050105556.

It is an arithmetic number, because the mean of its divisors is an integer number (1050105556).

Almost surely, 2^2100211111 is an apocalyptic number.

2100211111 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100211111 is an equidigital number, since it uses as much as digits as its factorization.

2100211111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 2100211111 is about 45828.0603015227. The cubic root of 2100211111 is about 1280.6220753509.

Adding to 2100211111 its reverse (1111120012), we get a palindrome (3211331123).

The spelling of 2100211111 in words is "two billion, one hundred million, two hundred eleven thousand, one hundred eleven".