211011109 has 2 divisors, whose sum is σ = 211011110. Its totient is φ = 211011108.

The previous prime is 211011083. The next prime is 211011127. The reversal of 211011109 is 901110112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204776100 + 6235009 = 14310^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 211011109 - 2⁷ = 211010981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211011092 and 211011101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211011209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105505554 + 105505555.

It is an arithmetic number, because the mean of its divisors is an integer number (105505555).

Almost surely, 2^211011109 is an apocalyptic number.

It is an amenable number.

211011109 is a deficient number, since it is larger than the sum of its proper divisors (1).

211011109 is an equidigital number, since it uses as much as digits as its factorization.

211011109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 211011109 is about 14526.2214288507. The cubic root of 211011109 is about 595.3446291044.

The spelling of 211011109 in words is "two hundred eleven million, eleven thousand, one hundred nine".