12446458221 has 12 divisors (see below), whose sum is σ = 16881335072. Its totient is φ = 8156994024.

The previous prime is 12446458207. The next prime is 12446458223. The reversal of 12446458221 is 12285464421.

It is not a de Polignac number, because 12446458221 - 2²⁹ = 11909587309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12446458221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12446458223) 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, 585481 + ... + 606366.

Almost surely, 2^12446458221 is an apocalyptic number.

It is an amenable number.

12446458221 is a deficient number, since it is larger than the sum of its proper divisors (4434876851).

12446458221 is an equidigital number, since it uses as much as digits as its factorization.

12446458221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191968 (or 1191909 counting only the distinct ones).

The product of its digits is 122880, while the sum is 39.

The spelling of 12446458221 in words is "twelve billion, four hundred forty-six million, four hundred fifty-eight thousand, two hundred twenty-one".