12208647711 has 24 divisors (see below), whose sum is σ = 17647062160. Its totient is φ = 7507493760.

The previous prime is 12208647709. The next prime is 12208647719. The reversal of 12208647711 is 11774680221.

It is not a de Polignac number, because 12208647711 - 2¹ = 12208647709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 12208647711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12208647719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8969671 + ... + 8971031.

Almost surely, 2^12208647711 is an apocalyptic number.

12208647711 is a deficient number, since it is larger than the sum of its proper divisors (5438414449).

12208647711 is an frugal number, since it uses more digits than its factorization.

12208647711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2764 (or 1377 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 39.

Multiplying 12208647711 by its sum of digits (39), we get a square (476137260729 = 690027²).

12208647711 divided by its sum of digits (39) gives a square (313042249 = 17693²).

The spelling of 12208647711 in words is "twelve billion, two hundred eight million, six hundred forty-seven thousand, seven hundred eleven".