4891212121984 has 32 divisors (see below), whose sum is σ = 10167873031440. Its totient is φ = 2339275361280.

The previous prime is 4891212121981. The next prime is 4891212122011.

It is a happy number.

4891212121984 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891212121981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 830705637 + ... + 830711524.

Almost surely, 2^{4891212121984} is an apocalyptic number.

It is an amenable number.

4891212121984 is an abundant number, since it is smaller than the sum of its proper divisors (5276660909456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4891212121984 is a wasteful number, since it uses less digits than its factorization.

4891212121984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661417198 (or 1661417186 counting only the distinct ones).

The product of its digits is 663552, while the sum is 52.

The spelling of 4891212121984 in words is "four trillion, eight hundred ninety-one billion, two hundred twelve million, one hundred twenty-one thousand, nine hundred eighty-four".