80221021 has 8 divisors (see below), whose sum is σ = 84538080. Its totient is φ = 75913488.

The previous prime is 80221013. The next prime is 80221027. The reversal of 80221021 is 12012208.

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 80221021 - 2³ = 80221013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 80220986 and 80221004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80221027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20775 + ... + 24331.

It is an arithmetic number, because the mean of its divisors is an integer number (10567260).

Almost surely, 2^80221021 is an apocalyptic number.

It is an amenable number.

80221021 is a deficient number, since it is larger than the sum of its proper divisors (4317059).

80221021 is a wasteful number, since it uses less digits than its factorization.

80221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4763.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 80221021 is about 8956.6188374855. The cubic root of 80221021 is about 431.2833858911.

Adding to 80221021 its reverse (12012208), we get a palindrome (92233229).

The spelling of 80221021 in words is "eighty million, two hundred twenty-one thousand, twenty-one".