11771211713 has 4 divisors (see below), whose sum is σ = 11772161988. Its totient is φ = 11770261440.

The previous prime is 11771211707. The next prime is 11771211743. The reversal of 11771211713 is 31711217711.

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 7019591089 + 4751620624 = 83783^2 + 68932^2 .

It is a cyclic number.

It is not a de Polignac number, because 11771211713 - 2⁸ = 11771211457 is a prime.

It is a super-2 number, since 2×11771211713² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11771211713.

It is not an unprimeable number, because it can be changed into a prime (11771211743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 456308 + ... + 481413.

It is an arithmetic number, because the mean of its divisors is an integer number (2943040497).

Almost surely, 2^11771211713 is an apocalyptic number.

It is an amenable number.

11771211713 is a deficient number, since it is larger than the sum of its proper divisors (950275).

11771211713 is an equidigital number, since it uses as much as digits as its factorization.

11771211713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950274.

The product of its digits is 2058, while the sum is 32.

The spelling of 11771211713 in words is "eleven billion, seven hundred seventy-one million, two hundred eleven thousand, seven hundred thirteen".