200123220221 has 8 divisors (see below), whose sum is σ = 200407563384. Its totient is φ = 199839006720.

The previous prime is 200123220173. The next prime is 200123220239. The reversal of 200123220221 is 122022321002.

It can be written as a sum of positive squares in 4 ways, for example, as 82895047225 + 117228172996 = 287915^2 + 342386^2 .

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 200123220221 - 2¹⁴ = 200123203837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200123220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200123220251) 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, 3296381 + ... + 3356541.

It is an arithmetic number, because the mean of its divisors is an integer number (25050945423).

Almost surely, 2^200123220221 is an apocalyptic number.

It is an amenable number.

200123220221 is a deficient number, since it is larger than the sum of its proper divisors (284343163).

200123220221 is an equidigital number, since it uses as much as digits as its factorization.

200123220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64831.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 200123220221 its reverse (122022321002), we get a palindrome (322145541223).

The spelling of 200123220221 in words is "two hundred billion, one hundred twenty-three million, two hundred twenty thousand, two hundred twenty-one".