200111101101221 has 4 divisors (see below), whose sum is σ = 200111486647692. Its totient is φ = 200110715554752.

The previous prime is 200111101101151. The next prime is 200111101101251. The reversal of 200111101101221 is 122101101111002.

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 135501496341121 + 64609604760100 = 11640511^2 + 8038010^2 .

It is a cyclic number.

It is not a de Polignac number, because 200111101101221 - 2³⁸ = 199836223194277 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 = 200111101101196 and 200111101101205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200111101101251) 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, 191993636 + ... + 193033101.

It is an arithmetic number, because the mean of its divisors is an integer number (50027871661923).

Almost surely, 2^{200111101101221} is an apocalyptic number.

It is an amenable number.

200111101101221 is a deficient number, since it is larger than the sum of its proper divisors (385546471).

200111101101221 is an equidigital number, since it uses as much as digits as its factorization.

200111101101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385546470.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 200111101101221 its reverse (122101101111002), we get a palindrome (322212202212223).

The spelling of 200111101101221 in words is "two hundred trillion, one hundred eleven billion, one hundred one million, one hundred one thousand, two hundred twenty-one".