12643477428121 has 8 divisors (see below), whose sum is σ = 12648688738560. Its totient is φ = 12638266402752.

The previous prime is 12643477428097. The next prime is 12643477428157. The reversal of 12643477428121 is 12182477434621.

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

It is a cyclic number.

It is not a de Polignac number, because 12643477428121 - 2¹⁷ = 12643477297049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12643477428521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164284176 + ... + 164361118.

It is an arithmetic number, because the mean of its divisors is an integer number (1581086092320).

Almost surely, 2^{12643477428121} is an apocalyptic number.

It is an amenable number.

12643477428121 is a deficient number, since it is larger than the sum of its proper divisors (5211310439).

12643477428121 is an equidigital number, since it uses as much as digits as its factorization.

12643477428121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142535.

The product of its digits is 3612672, while the sum is 52.

The spelling of 12643477428121 in words is "twelve trillion, six hundred forty-three billion, four hundred seventy-seven million, four hundred twenty-eight thousand, one hundred twenty-one".