211141109 has 2 divisors, whose sum is σ = 211141110. Its totient is φ = 211141108.

The previous prime is 211141097. The next prime is 211141111. The reversal of 211141109 is 901141112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189145009 + 21996100 = 13753^2 + 4690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211141109 is a prime.

Together with 211141111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211143109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105570554 + 105570555.

It is an arithmetic number, because the mean of its divisors is an integer number (105570555).

Almost surely, 2^211141109 is an apocalyptic number.

It is an amenable number.

211141109 is a deficient number, since it is larger than the sum of its proper divisors (1).

211141109 is an equidigital number, since it uses as much as digits as its factorization.

211141109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 211141109 is about 14530.6954066211. The cubic root of 211141109 is about 595.4668642381.

The spelling of 211141109 in words is "two hundred eleven million, one hundred forty-one thousand, one hundred nine".