211044109 has 2 divisors, whose sum is σ = 211044110. Its totient is φ = 211044108.

The previous prime is 211044101. The next prime is 211044133. The reversal of 211044109 is 901440112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 203148009 + 7896100 = 14253^2 + 2810^2 .

It is a cyclic number.

It is not a de Polignac number, because 211044109 - 2³ = 211044101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211044109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211044101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105522054 + 105522055.

It is an arithmetic number, because the mean of its divisors is an integer number (105522055).

Almost surely, 2^211044109 is an apocalyptic number.

It is an amenable number.

211044109 is a deficient number, since it is larger than the sum of its proper divisors (1).

211044109 is an equidigital number, since it uses as much as digits as its factorization.

211044109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 211044109 is about 14527.3572613879. The cubic root of 211044109 is about 595.3756627764.

The spelling of 211044109 in words is "two hundred eleven million, forty-four thousand, one hundred nine".