1000200221 has 4 divisors (see below), whose sum is σ = 1000366332. Its totient is φ = 1000034112.

The previous prime is 1000200203. The next prime is 1000200239. The reversal of 1000200221 is 1220020001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1220020001 = 19 ⋅64211579.

It is an interprime number because it is at equal distance from previous prime (1000200203) and next prime (1000200239).

It can be written as a sum of positive squares in 2 ways, for example, as 599760100 + 400440121 = 24490^2 + 20011^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000200221 - 2¹⁴ = 1000183837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1000200199 and 1000200208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000202221) 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, 73670 + ... + 86183.

It is an arithmetic number, because the mean of its divisors is an integer number (250091583).

Almost surely, 2^1000200221 is an apocalyptic number.

It is an amenable number.

1000200221 is a deficient number, since it is larger than the sum of its proper divisors (166111).

1000200221 is an equidigital number, since it uses as much as digits as its factorization.

1000200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166110.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1000200221 is about 31625.9422152131. The cubic root of 1000200221 is about 1000.0667358796.

Adding to 1000200221 its reverse (1220020001), we get a palindrome (2220220222).

The spelling of 1000200221 in words is "one billion, two hundred thousand, two hundred twenty-one".