12822786221 has 4 divisors (see below), whose sum is σ = 14654612832. Its totient is φ = 10990959612.

The previous prime is 12822786187. The next prime is 12822786241. The reversal of 12822786221 is 12268722821.

12822786221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12822786221 - 2⁶ = 12822786157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12822786241) 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 3 ways as a sum of consecutive naturals, for example, 915913295 + ... + 915913308.

It is an arithmetic number, because the mean of its divisors is an integer number (3663653208).

Almost surely, 2^12822786221 is an apocalyptic number.

It is an amenable number.

12822786221 is a deficient number, since it is larger than the sum of its proper divisors (1831826611).

12822786221 is an equidigital number, since it uses as much as digits as its factorization.

12822786221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1831826610.

The product of its digits is 86016, while the sum is 41.

The spelling of 12822786221 in words is "twelve billion, eight hundred twenty-two million, seven hundred eighty-six thousand, two hundred twenty-one".