1284085441821 has 48 divisors (see below), whose sum is σ = 2145615912960. Its totient is φ = 668745979200.

The previous prime is 1284085441819. The next prime is 1284085441897. The reversal of 1284085441821 is 1281445804821.

It is not a de Polignac number, because 1284085441821 - 2¹ = 1284085441819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284085441811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2009605 + ... + 2570346.

It is an arithmetic number, because the mean of its divisors is an integer number (44700331520).

Almost surely, 2^{1284085441821} is an apocalyptic number.

It is an amenable number.

1284085441821 is a deficient number, since it is larger than the sum of its proper divisors (861530471139).

1284085441821 is a wasteful number, since it uses less digits than its factorization.

1284085441821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4580066 (or 4580053 counting only the distinct ones).

The product of its (nonzero) digits is 655360, while the sum is 48.

The spelling of 1284085441821 in words is "one trillion, two hundred eighty-four billion, eighty-five million, four hundred forty-one thousand, eight hundred twenty-one".