211320754717 has 4 divisors (see below), whose sum is σ = 211333445820. Its totient is φ = 211308063616.

The previous prime is 211320754669. The next prime is 211320754741. The reversal of 211320754717 is 717457023112.

It is a happy number.

211320754717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 181215381636 + 30105373081 = 425694^2 + 173509^2 .

It is a cyclic number.

It is not a de Polignac number, because 211320754717 - 2²⁷ = 211186536989 is a prime.

It is a super-2 number, since 2×211320754717² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211320754717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211320754817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6320542 + ... + 6353887.

It is an arithmetic number, because the mean of its divisors is an integer number (52833361455).

Almost surely, 2^211320754717 is an apocalyptic number.

It is an amenable number.

211320754717 is a deficient number, since it is larger than the sum of its proper divisors (12691103).

211320754717 is a wasteful number, since it uses less digits than its factorization.

211320754717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12691102.

The product of its (nonzero) digits is 82320, while the sum is 40.

Adding to 211320754717 its reverse (717457023112), we get a palindrome (928777777829).

The spelling of 211320754717 in words is "two hundred eleven billion, three hundred twenty million, seven hundred fifty-four thousand, seven hundred seventeen".