80821185221 has 8 divisors (see below), whose sum is σ = 94515140544. Its totient is φ = 67664247840.

The previous prime is 80821185173. The next prime is 80821185233. The reversal of 80821185221 is 12258112808.

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

It is not a de Polignac number, because 80821185221 - 2¹⁴ = 80821168837 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 (80821185421) 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, 134254160 + ... + 134254761.

It is an arithmetic number, because the mean of its divisors is an integer number (11814392568).

Almost surely, 2^80821185221 is an apocalyptic number.

It is an amenable number.

80821185221 is a deficient number, since it is larger than the sum of its proper divisors (13693955323).

80821185221 is a wasteful number, since it uses less digits than its factorization.

80821185221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268508971.

The product of its (nonzero) digits is 20480, while the sum is 38.

The spelling of 80821185221 in words is "eighty billion, eight hundred twenty-one million, one hundred eighty-five thousand, two hundred twenty-one".