12211052565 has 16 divisors (see below), whose sum is σ = 19539072000. Its totient is φ = 6512098752.

The previous prime is 12211052531. The next prime is 12211052569. The reversal of 12211052565 is 56525011221.

It is not a de Polignac number, because 12211052565 - 2⁷ = 12211052437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211052569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346636 + ... + 380234.

It is an arithmetic number, because the mean of its divisors is an integer number (1221192000).

Almost surely, 2^12211052565 is an apocalyptic number.

12211052565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12211052565 is a deficient number, since it is larger than the sum of its proper divisors (7328019435).

12211052565 is a wasteful number, since it uses less digits than its factorization.

12211052565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57836.

The product of its (nonzero) digits is 6000, while the sum is 30.

Adding to 12211052565 its reverse (56525011221), we get a palindrome (68736063786).

The spelling of 12211052565 in words is "twelve billion, two hundred eleven million, fifty-two thousand, five hundred sixty-five".