821883121 has 8 divisors (see below), whose sum is σ = 825552000. Its totient is φ = 818221440.

The previous prime is 821883119. The next prime is 821883151. The reversal of 821883121 is 121388128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 821883121 - 2¹ = 821883119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (821883151) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 434145 + ... + 436033.

It is an arithmetic number, because the mean of its divisors is an integer number (103194000).

Almost surely, 2^821883121 is an apocalyptic number.

It is an amenable number.

821883121 is a deficient number, since it is larger than the sum of its proper divisors (3668879).

821883121 is a wasteful number, since it uses less digits than its factorization.

821883121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3599.

The product of its digits is 6144, while the sum is 34.

The square root of 821883121 is about 28668.5039895702. The cubic root of 821883121 is about 936.7061115818.

The spelling of 821883121 in words is "eight hundred twenty-one million, eight hundred eighty-three thousand, one hundred twenty-one".