211100012201005 has 4 divisors (see below), whose sum is σ = 253320014641212. Its totient is φ = 168880009760800.

The previous prime is 211100012200999. The next prime is 211100012201017. The reversal of 211100012201005 is 500102210001112.

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 30235008857769 + 180865003343236 = 5498637^2 + 13448606^2 .

It is not a de Polignac number, because 211100012201005 - 2⁷ = 211100012200877 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211100012201005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21110001220096 + ... + 21110001220105.

It is an arithmetic number, because the mean of its divisors is an integer number (63330003660303).

Almost surely, 2^{211100012201005} is an apocalyptic number.

It is an amenable number.

211100012201005 is a deficient number, since it is larger than the sum of its proper divisors (42220002440207).

211100012201005 is an equidigital number, since it uses as much as digits as its factorization.

211100012201005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42220002440206.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 211100012201005 its reverse (500102210001112), we get a palindrome (711202222202117).

The spelling of 211100012201005 in words is "two hundred eleven trillion, one hundred billion, twelve million, two hundred one thousand, five".