10212111212209 has 2 divisors, whose sum is σ = 10212111212210. Its totient is φ = 10212111212208.

The previous prime is 10212111212203. The next prime is 10212111212243. The reversal of 10212111212209 is 90221211121201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10077113755809 + 134997456400 = 3174447^2 + 367420^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212111212209 - 2¹⁵ = 10212111179441 is a prime.

It is not a weakly prime, because it can be changed into another prime (10212111212203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106055606104 + 5106055606105.

It is an arithmetic number, because the mean of its divisors is an integer number (5106055606105).

Almost surely, 2^{10212111212209} is an apocalyptic number.

It is an amenable number.

10212111212209 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212111212209 is an equidigital number, since it uses as much as digits as its factorization.

10212111212209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 10212111212209 in words is "ten trillion, two hundred twelve billion, one hundred eleven million, two hundred twelve thousand, two hundred nine".