120821503284 has 96 divisors (see below), whose sum is σ = 331815052800. Its totient is φ = 37887851520.

The previous prime is 120821503279. The next prime is 120821503337. The reversal of 120821503284 is 482305128021.

It is a happy number.

120821503284 is a `hidden beast` number, since 120 + 8 + 2 + 1 + 503 + 28 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4468197 + ... + 4495155.

It is an arithmetic number, because the mean of its divisors is an integer number (3456406800).

Almost surely, 2^120821503284 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 120821503284, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165907526400).

120821503284 is an abundant number, since it is smaller than the sum of its proper divisors (210993549516).

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

120821503284 is a wasteful number, since it uses less digits than its factorization.

120821503284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29430 (or 29422 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The spelling of 120821503284 in words is "one hundred twenty billion, eight hundred twenty-one million, five hundred three thousand, two hundred eighty-four".