212102004077209 has 2 divisors, whose sum is σ = 212102004077210. Its totient is φ = 212102004077208.

The previous prime is 212102004077167. The next prime is 212102004077231. The reversal of 212102004077209 is 902770400201212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 174363441855625 + 37738562221584 = 13204675^2 + 6143172^2 .

It is a cyclic number.

It is not a de Polignac number, because 212102004077209 - 2¹⁷ = 212102003946137 is a prime.

It is not a weakly prime, because it can be changed into another prime (212102004077279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106051002038604 + 106051002038605.

It is an arithmetic number, because the mean of its divisors is an integer number (106051002038605).

Almost surely, 2^{212102004077209} is an apocalyptic number.

It is an amenable number.

212102004077209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212102004077209 is an equidigital number, since it uses as much as digits as its factorization.

212102004077209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The spelling of 212102004077209 in words is "two hundred twelve trillion, one hundred two billion, four million, seventy-seven thousand, two hundred nine".