2100011212105 has 8 divisors (see below), whose sum is σ = 2520037195200. Its totient is φ = 1679993142576.

The previous prime is 2100011212073. The next prime is 2100011212111. The reversal of 2100011212105 is 5012121100012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2100011212105 - 2⁵ = 2100011212073 is a prime.

It is a super-2 number, since 2×2100011212105² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1378015 + ... + 2469604.

It is an arithmetic number, because the mean of its divisors is an integer number (315004649400).

Almost surely, 2^{2100011212105} is an apocalyptic number.

It is an amenable number.

2100011212105 is a deficient number, since it is larger than the sum of its proper divisors (420025983095).

2100011212105 is a wasteful number, since it uses less digits than its factorization.

2100011212105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956783.

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

Adding to 2100011212105 its reverse (5012121100012), we get a palindrome (7112132312117).

The spelling of 2100011212105 in words is "two trillion, one hundred billion, eleven million, two hundred twelve thousand, one hundred five".