211110009989 has 2 divisors, whose sum is σ = 211110009990. Its totient is φ = 211110009988.

The previous prime is 211110009949. The next prime is 211110009991. The reversal of 211110009989 is 989900011112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157781345089 + 53328664900 = 397217^2 + 230930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211110009989 is a prime.

It is a super-3 number, since 3×211110009989³ (a number of 35 digits) contains 333 as substring.

Together with 211110009991, 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 (211110009919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105555004994 + 105555004995.

It is an arithmetic number, because the mean of its divisors is an integer number (105555004995).

Almost surely, 2^211110009989 is an apocalyptic number.

It is an amenable number.

211110009989 is a deficient number, since it is larger than the sum of its proper divisors (1).

211110009989 is an equidigital number, since it uses as much as digits as its factorization.

211110009989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 41.

The spelling of 211110009989 in words is "two hundred eleven billion, one hundred ten million, nine thousand, nine hundred eighty-nine".