12891241285 has 16 divisors (see below), whose sum is σ = 16941818880. Its totient is φ = 9358332480.

The previous prime is 12891241271. The next prime is 12891241291. The reversal of 12891241285 is 58214219821.

It is a de Polignac number, because none of the positive numbers 2^k-12891241285 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1676901 + ... + 1684570.

It is an arithmetic number, because the mean of its divisors is an integer number (1058863680).

Almost surely, 2^12891241285 is an apocalyptic number.

It is an amenable number.

12891241285 is a deficient number, since it is larger than the sum of its proper divisors (4050577595).

12891241285 is a wasteful number, since it uses less digits than its factorization.

12891241285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3361548.

The product of its digits is 92160, while the sum is 43.

The spelling of 12891241285 in words is "twelve billion, eight hundred ninety-one million, two hundred forty-one thousand, two hundred eighty-five".