200111221 has 8 divisors (see below), whose sum is σ = 201529944. Its totient is φ = 198696960.

The previous prime is 200111209. The next prime is 200111227. The reversal of 200111221 is 122111002.

It can be written as a sum of positive squares in 4 ways, for example, as 81540900 + 118570321 = 9030^2 + 10889^2 .

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 200111221 - 2⁵ = 200111189 is a prime.

It is a super-2 number, since 2×200111221² = 80089001540221682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200111198 and 200111207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111227) 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, 172981 + ... + 174133.

It is an arithmetic number, because the mean of its divisors is an integer number (25191243).

Almost surely, 2^200111221 is an apocalyptic number.

It is an amenable number.

200111221 is a deficient number, since it is larger than the sum of its proper divisors (1418723).

200111221 is a wasteful number, since it uses less digits than its factorization.

200111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2231.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 200111221 is about 14146.0673333616. The cubic root of 200111221 is about 584.9119316131.

Adding to 200111221 its reverse (122111002), we get a palindrome (322222223).

The spelling of 200111221 in words is "two hundred million, one hundred eleven thousand, two hundred twenty-one".