12256065221 has 8 divisors (see below), whose sum is σ = 13196960640. Its totient is φ = 11339608768.

The previous prime is 12256065167. The next prime is 12256065229.

12256065221 is nontrivially palindromic in base 10.

12256065221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12256065221 is a prime.

It is a super-2 number, since 2×12256065221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12256065229) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6108701 + ... + 6110706.

It is an arithmetic number, because the mean of its divisors is an integer number (1649620080).

Almost surely, 2^12256065221 is an apocalyptic number.

It is an amenable number.

12256065221 is a deficient number, since it is larger than the sum of its proper divisors (940895419).

12256065221 is a wasteful number, since it uses less digits than its factorization.

12256065221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12219483.

The product of its (nonzero) digits is 14400, while the sum is 32.

It can be divided in two parts, 122560 and 65221, that added together give a palindrome (187781).

The spelling of 12256065221 in words is "twelve billion, two hundred fifty-six million, sixty-five thousand, two hundred twenty-one".