201112110020221 has 4 divisors (see below), whose sum is σ = 201990328841500. Its totient is φ = 200233891198944.

The previous prime is 201112110020183. The next prime is 201112110020299. The reversal of 201112110020221 is 122020011211102.

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 191438050620996 + 9674059399225 = 13836114^2 + 3110315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201112110020221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201112110020195 and 201112110020204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201112110020021) 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, 439109410296 + ... + 439109410753.

It is an arithmetic number, because the mean of its divisors is an integer number (50497582210375).

Almost surely, 2^{201112110020221} is an apocalyptic number.

It is an amenable number.

201112110020221 is a deficient number, since it is larger than the sum of its proper divisors (878218821279).

201112110020221 is an equidigital number, since it uses as much as digits as its factorization.

201112110020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878218821278.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201112110020221 its reverse (122020011211102), we get a palindrome (323132121231323).

The spelling of 201112110020221 in words is "two hundred one trillion, one hundred twelve billion, one hundred ten million, twenty thousand, two hundred twenty-one".