211996567085 has 4 divisors (see below), whose sum is σ = 254395880508. Its totient is φ = 169597253664.

The previous prime is 211996567067. The next prime is 211996567141. The reversal of 211996567085 is 580765699112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 122445406084 + 89551161001 = 349922^2 + 299251^2 .

It is a cyclic number.

It is not a de Polignac number, because 211996567085 - 2¹² = 211996562989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21199656704 + ... + 21199656713.

It is an arithmetic number, because the mean of its divisors is an integer number (63598970127).

Almost surely, 2^211996567085 is an apocalyptic number.

It is an amenable number.

211996567085 is a deficient number, since it is larger than the sum of its proper divisors (42399313423).

211996567085 is an equidigital number, since it uses as much as digits as its factorization.

211996567085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42399313422.

The product of its (nonzero) digits is 8164800, while the sum is 59.

The spelling of 211996567085 in words is "two hundred eleven billion, nine hundred ninety-six million, five hundred sixty-seven thousand, eighty-five".