12284478636421 has 4 divisors (see below), whose sum is σ = 12303583580512. Its totient is φ = 12265373692332.

The previous prime is 12284478636379. The next prime is 12284478636457. The reversal of 12284478636421 is 12463687448221.

It is a happy number.

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 12284478636421 - 2⁷ = 12284478636293 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 (12284478636481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9552471081 + ... + 9552472366.

It is an arithmetic number, because the mean of its divisors is an integer number (3075895895128).

Almost surely, 2^{12284478636421} is an apocalyptic number.

It is an amenable number.

12284478636421 is a deficient number, since it is larger than the sum of its proper divisors (19104944091).

12284478636421 is an equidigital number, since it uses as much as digits as its factorization.

12284478636421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19104944090.

The product of its digits is 24772608, while the sum is 58.

The spelling of 12284478636421 in words is "twelve trillion, two hundred eighty-four billion, four hundred seventy-eight million, six hundred thirty-six thousand, four hundred twenty-one".