80202018221 has 4 divisors (see below), whose sum is σ = 86371404252. Its totient is φ = 74032632192.

The previous prime is 80202018179. The next prime is 80202018223. The reversal of 80202018221 is 12281020208.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5907613321 + 74294404900 = 76861^2 + 272570^2 .

It is a cyclic number.

It is not a de Polignac number, because 80202018221 - 2¹⁰ = 80202017197 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 (80202018223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3084692996 + ... + 3084693021.

It is an arithmetic number, because the mean of its divisors is an integer number (21592851063).

Almost surely, 2^80202018221 is an apocalyptic number.

It is an amenable number.

80202018221 is a deficient number, since it is larger than the sum of its proper divisors (6169386031).

80202018221 is a wasteful number, since it uses less digits than its factorization.

80202018221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6169386030.

The product of its (nonzero) digits is 1024, while the sum is 26.

Adding to 80202018221 its reverse (12281020208), we get a palindrome (92483038429).

The spelling of 80202018221 in words is "eighty billion, two hundred two million, eighteen thousand, two hundred twenty-one".