200111211221 has 8 divisors (see below), whose sum is σ = 202171806264. Its totient is φ = 198052171200.

The previous prime is 200111211217. The next prime is 200111211227. The reversal of 200111211221 is 122112111002.

It can be written as a sum of positive squares in 4 ways, for example, as 136392830596 + 63718380625 = 369314^2 + 252425^2 .

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 200111211221 - 2² = 200111211217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200111211196 and 200111211205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111211227) 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, 129170 + ... + 645683.

It is an arithmetic number, because the mean of its divisors is an integer number (25271475783).

Almost surely, 2^200111211221 is an apocalyptic number.

It is an amenable number.

200111211221 is a deficient number, since it is larger than the sum of its proper divisors (2060595043).

200111211221 is a wasteful number, since it uses less digits than its factorization.

200111211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777511.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 200111211221 its reverse (122112111002), we get a palindrome (322223322223).

The spelling of 200111211221 in words is "two hundred billion, one hundred eleven million, two hundred eleven thousand, two hundred twenty-one".