8200120221 has 48 divisors (see below), whose sum is σ = 12989403648. Its totient is φ = 4964467200.

The previous prime is 8200120199. The next prime is 8200120223. The reversal of 8200120221 is 1220210028.

It is a happy number.

It is not a de Polignac number, because 8200120221 - 2⁵ = 8200120189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8200120194 and 8200120203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8200120223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 502531 + ... + 518591.

It is an arithmetic number, because the mean of its divisors is an integer number (270612576).

Almost surely, 2^8200120221 is an apocalyptic number.

It is an amenable number.

8200120221 is a deficient number, since it is larger than the sum of its proper divisors (4789283427).

8200120221 is a wasteful number, since it uses less digits than its factorization.

8200120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16202 (or 16199 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 8200120221 is about 90554.5151883660. The cubic root of 8200120221 is about 2016.5395300160.

Adding to 8200120221 its reverse (1220210028), we get a palindrome (9420330249).

The spelling of 8200120221 in words is "eight billion, two hundred million, one hundred twenty thousand, two hundred twenty-one".