211101985 has 8 divisors (see below), whose sum is σ = 253443456. Its totient is φ = 168800880.

The previous prime is 211101953. The next prime is 211101997. The reversal of 211101985 is 589101112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211101985 - 2⁵ = 211101953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2952 + ... + 20758.

It is an arithmetic number, because the mean of its divisors is an integer number (31680432).

Almost surely, 2^211101985 is an apocalyptic number.

It is an amenable number.

211101985 is a deficient number, since it is larger than the sum of its proper divisors (42341471).

211101985 is a wasteful number, since it uses less digits than its factorization.

211101985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20183.

The product of its (nonzero) digits is 720, while the sum is 28.

The square root of 211101985 is about 14529.3490907198. The cubic root of 211101985 is about 595.4300823835.

The spelling of 211101985 in words is "two hundred eleven million, one hundred one thousand, nine hundred eighty-five".