200111000221021 has 4 divisors (see below), whose sum is σ = 200470265931132. Its totient is φ = 199751734510912.

The previous prime is 200111000220959. The next prime is 200111000221079. The reversal of 200111000221021 is 120122000111002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 127076696208900 + 73034304012121 = 11272830^2 + 8546011^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111000221021 - 2¹¹ = 200111000218973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200111000220992 and 200111000221010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111000221721) 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, 179632854220 + ... + 179632855333.

It is an arithmetic number, because the mean of its divisors is an integer number (50117566482783).

Almost surely, 2^{200111000221021} is an apocalyptic number.

It is an amenable number.

200111000221021 is a deficient number, since it is larger than the sum of its proper divisors (359265710111).

200111000221021 is an equidigital number, since it uses as much as digits as its factorization.

200111000221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359265710110.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 200111000221021 its reverse (120122000111002), we get a palindrome (320233000332023).

The spelling of 200111000221021 in words is "two hundred trillion, one hundred eleven billion, two hundred twenty-one thousand, twenty-one".