12268356821 has 12 divisors (see below), whose sum is σ = 14287140288. Its totient is φ = 10504102392.

The previous prime is 12268356817. The next prime is 12268356899. The reversal of 12268356821 is 12865386221.

It is not a de Polignac number, because 12268356821 - 2² = 12268356817 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 (12268356811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 93581 + ... + 182466.

It is an arithmetic number, because the mean of its divisors is an integer number (1190595024).

Almost surely, 2^12268356821 is an apocalyptic number.

It is an amenable number.

12268356821 is a deficient number, since it is larger than the sum of its proper divisors (2018783467).

12268356821 is an equidigital number, since it uses as much as digits as its factorization.

12268356821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276968 (or 276961 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The spelling of 12268356821 in words is "twelve billion, two hundred sixty-eight million, three hundred fifty-six thousand, eight hundred twenty-one".