212011001178209 has 2 divisors, whose sum is σ = 212011001178210. Its totient is φ = 212011001178208.

The previous prime is 212011001178203. The next prime is 212011001178233. The reversal of 212011001178209 is 902871100110212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209846948349025 + 2164052829184 = 14486095^2 + 1471072^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011001178209 - 2²⁰ = 212011000129633 is a prime.

It is not a weakly prime, because it can be changed into another prime (212011001178203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005500589104 + 106005500589105.

It is an arithmetic number, because the mean of its divisors is an integer number (106005500589105).

Almost surely, 2^{212011001178209} is an apocalyptic number.

It is an amenable number.

212011001178209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011001178209 is an equidigital number, since it uses as much as digits as its factorization.

212011001178209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 35.

The spelling of 212011001178209 in words is "two hundred twelve trillion, eleven billion, one million, one hundred seventy-eight thousand, two hundred nine".