201111100221005 has 16 divisors (see below), whose sum is σ = 259900281701424. Its totient is φ = 148511178255360.

The previous prime is 201111100220981. The next prime is 201111100221007. The reversal of 201111100221005 is 500122001111102.

It can be written as a sum of positive squares in 8 ways, for example, as 25422994262884 + 175688105958121 = 5042122^2 + 13254739^2 .

It is not a de Polignac number, because 201111100221005 - 2²⁰ = 201111099172429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111100221007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11054654 + ... + 22900383.

It is an arithmetic number, because the mean of its divisors is an integer number (16243767606339).

Almost surely, 2^{201111100221005} is an apocalyptic number.

It is an amenable number.

201111100221005 is a deficient number, since it is larger than the sum of its proper divisors (58789181480419).

201111100221005 is a wasteful number, since it uses less digits than its factorization.

201111100221005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34046176.

The product of its (nonzero) digits is 40, while the sum is 17.

Adding to 201111100221005 its reverse (500122001111102), we get a palindrome (701233101332107).

The spelling of 201111100221005 in words is "two hundred one trillion, one hundred eleven billion, one hundred million, two hundred twenty-one thousand, five".