2121798883032 has 128 divisors (see below), whose sum is σ = 5999588352000. Its totient is φ = 694687276800.

The previous prime is 2121798882997. The next prime is 2121798883133. The reversal of 2121798883032 is 2303888971212.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2121798883032.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 2537353 + ... + 3268295.

It is an arithmetic number, because the mean of its divisors is an integer number (46871784000).

Almost surely, 2^{2121798883032} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121798883032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2999794176000).

2121798883032 is an abundant number, since it is smaller than the sum of its proper divisors (3877789468968).

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

2121798883032 is a wasteful number, since it uses less digits than its factorization.

2121798883032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731198 (or 731188 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 2121798883032 in words is "two trillion, one hundred twenty-one billion, seven hundred ninety-eight million, eight hundred eighty-three thousand, thirty-two".