2121283555960 has 128 divisors (see below), whose sum is σ = 5009813867520. Its totient is φ = 807566602752.

The previous prime is 2121283555957. The next prime is 2121283556023. The reversal of 2121283555960 is 695553821212.

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 31 ways as a sum of consecutive naturals, for example, 18292882 + ... + 18408478.

It is an arithmetic number, because the mean of its divisors is an integer number (39139170840).

Almost surely, 2^{2121283555960} is an apocalyptic number.

2121283555960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2121283555960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2504906933760).

2121283555960 is an abundant number, since it is smaller than the sum of its proper divisors (2888530311560).

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

2121283555960 is a wasteful number, since it uses less digits than its factorization.

2121283555960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115925 (or 115921 counting only the distinct ones).

The product of its (nonzero) digits is 1296000, while the sum is 49.

The spelling of 2121283555960 in words is "two trillion, one hundred twenty-one billion, two hundred eighty-three million, five hundred fifty-five thousand, nine hundred sixty".