2121831209184 has 24 divisors (see below), whose sum is σ = 5569806924360. Its totient is φ = 707277069696.

The previous prime is 2121831209171. The next prime is 2121831209191. The reversal of 2121831209184 is 4819021381212.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11051204119 + ... + 11051204310.

It is an arithmetic number, because the mean of its divisors is an integer number (232075288515).

Almost surely, 2^{2121831209184} is an apocalyptic number.

2121831209184 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2121831209184 is an abundant number, since it is smaller than the sum of its proper divisors (3447975715176).

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

2121831209184 is a wasteful number, since it uses less digits than its factorization.

2121831209184 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22102408442 (or 22102408434 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 42.

The spelling of 2121831209184 in words is "two trillion, one hundred twenty-one billion, eight hundred thirty-one million, two hundred nine thousand, one hundred eighty-four".