211120199999909 has 2 divisors, whose sum is σ = 211120199999910. Its totient is φ = 211120199999908.

The previous prime is 211120199999893. The next prime is 211120200000041. The reversal of 211120199999909 is 909999991021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202567528994884 + 8552671005025 = 14232622^2 + 2924495^2 .

It is a cyclic number.

It is not a de Polignac number, because 211120199999909 - 2⁴ = 211120199999893 is a prime.

It is a super-2 number, since 2×211120199999909² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211120199993909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105560099999954 + 105560099999955.

It is an arithmetic number, because the mean of its divisors is an integer number (105560099999955).

Almost surely, 2^{211120199999909} is an apocalyptic number.

It is an amenable number.

211120199999909 is a deficient number, since it is larger than the sum of its proper divisors (1).

211120199999909 is an equidigital number, since it uses as much as digits as its factorization.

211120199999909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19131876, while the sum is 71.

The spelling of 211120199999909 in words is "two hundred eleven trillion, one hundred twenty billion, one hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred nine".