12211051565104 has 80 divisors (see below), whose sum is σ = 27405731635200. Its totient is φ = 5162400052992.

The previous prime is 12211051565099. The next prime is 12211051565159. The reversal of 12211051565104 is 40156515011221.

It is a self number, because there is not a number n which added to its sum of digits gives 12211051565104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9190209 + ... + 10434655.

It is an arithmetic number, because the mean of its divisors is an integer number (342571645440).

Almost surely, 2^{12211051565104} is an apocalyptic number.

12211051565104 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12211051565104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13702865817600).

12211051565104 is an abundant number, since it is smaller than the sum of its proper divisors (15194680070096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12211051565104 is a wasteful number, since it uses less digits than its factorization.

12211051565104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245650 (or 1245644 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 34.

Adding to 12211051565104 its reverse (40156515011221), we get a palindrome (52367566576325).

The spelling of 12211051565104 in words is "twelve trillion, two hundred eleven billion, fifty-one million, five hundred sixty-five thousand, one hundred four".