2121982535880 has 96 divisors (see below), whose sum is σ = 6896876758200. Its totient is φ = 565826439168.

The previous prime is 2121982535873. The next prime is 2121982535929. The reversal of 2121982535880 is 885352891212.

2121982535880 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 9 + 8 + 2 + 53 + 588 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2118020336964 + 3962198916 = 1455342^2 + 62946^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5819586 + ... + 6173454.

Almost surely, 2^{2121982535880} is an apocalyptic number.

2121982535880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121982535880 is an abundant number, since it is smaller than the sum of its proper divisors (4774894222320).

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

2121982535880 is a wasteful number, since it uses less digits than its factorization.

2121982535880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370543 (or 370536 counting only the distinct ones).

The product of its (nonzero) digits is 2764800, while the sum is 54.

The spelling of 2121982535880 in words is "two trillion, one hundred twenty-one billion, nine hundred eighty-two million, five hundred thirty-five thousand, eight hundred eighty".