12220323525512 has 8 divisors (see below), whose sum is σ = 22913106610350. Its totient is φ = 6110161762752.

The previous prime is 12220323525497. The next prime is 12220323525517. The reversal of 12220323525512 is 21552532302221.

It can be written as a sum of positive squares in only one way, i.e., 6965344969636 + 5254978555876 = 2639194^2 + 2292374^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (12220323525517) 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 as a sum of consecutive naturals, namely, 763770220337 + ... + 763770220352.

Almost surely, 2^{12220323525512} is an apocalyptic number.

It is an amenable number.

12220323525512 is a deficient number, since it is larger than the sum of its proper divisors (10692783084838).

12220323525512 is a wasteful number, since it uses less digits than its factorization.

12220323525512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1527540440695 (or 1527540440691 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 12220323525512 its reverse (21552532302221), we get a palindrome (33772855827733).

The spelling of 12220323525512 in words is "twelve trillion, two hundred twenty billion, three hundred twenty-three million, five hundred twenty-five thousand, five hundred twelve".