989000221021 has 8 divisors (see below), whose sum is σ = 990317171840. Its totient is φ = 987683424768.

The previous prime is 989000221019. The next prime is 989000221031. The reversal of 989000221021 is 120122000989.

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 989000221021 - 2¹ = 989000221019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989000221031) 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, 18772765 + ... + 18825373.

It is an arithmetic number, because the mean of its divisors is an integer number (123789646480).

Almost surely, 2^989000221021 is an apocalyptic number.

It is an amenable number.

989000221021 is a deficient number, since it is larger than the sum of its proper divisors (1316950819).

989000221021 is a wasteful number, since it uses less digits than its factorization.

989000221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77283.

The product of its (nonzero) digits is 5184, while the sum is 34.

The spelling of 989000221021 in words is "nine hundred eighty-nine billion, two hundred twenty-one thousand, twenty-one".