212101200012009 has 64 divisors (see below), whose sum is σ = 377821917849600. Its totient is φ = 102451710213120.

The previous prime is 212101200011977. The next prime is 212101200012029. The reversal of 212101200012009 is 900210002101212.

It is not a de Polignac number, because 212101200012009 - 2⁵ = 212101200011977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (212101200012029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 325041534 + ... + 325693415.

It is an arithmetic number, because the mean of its divisors is an integer number (5903467466400).

Almost surely, 2^{212101200012009} is an apocalyptic number.

It is an amenable number.

212101200012009 is a deficient number, since it is larger than the sum of its proper divisors (165720717837591).

212101200012009 is a wasteful number, since it uses less digits than its factorization.

212101200012009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650735070.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 212101200012009 in words is "two hundred twelve trillion, one hundred one billion, two hundred million, twelve thousand, nine".