119821109 has 2 divisors, whose sum is σ = 119821110. Its totient is φ = 119821108.

The previous prime is 119821081. The next prime is 119821111. The reversal of 119821109 is 901128911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107019025 + 12802084 = 10345^2 + 3578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-119821109 is a prime.

It is a Sophie Germain prime.

Together with 119821111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (119821129) 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, 59910554 + 59910555.

It is an arithmetic number, because the mean of its divisors is an integer number (59910555).

Almost surely, 2^119821109 is an apocalyptic number.

It is an amenable number.

119821109 is a deficient number, since it is larger than the sum of its proper divisors (1).

119821109 is an equidigital number, since it uses as much as digits as its factorization.

119821109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 119821109 is about 10946.2828850711. The cubic root of 119821109 is about 492.9971912225.

The spelling of 119821109 in words is "one hundred nineteen million, eight hundred twenty-one thousand, one hundred nine".