212215610562209 has 2 divisors, whose sum is σ = 212215610562210. Its totient is φ = 212215610562208.

The previous prime is 212215610562161. The next prime is 212215610562281. The reversal of 212215610562209 is 902265016512212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 139483658502400 + 72731952059809 = 11810320^2 + 8528303^2 .

It is a cyclic number.

It is not a de Polignac number, because 212215610562209 - 2⁸ = 212215610561953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212215610562209.

It is not a weakly prime, because it can be changed into another prime (212215610462209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106107805281104 + 106107805281105.

It is an arithmetic number, because the mean of its divisors is an integer number (106107805281105).

Almost surely, 2^{212215610562209} is an apocalyptic number.

It is an amenable number.

212215610562209 is a deficient number, since it is larger than the sum of its proper divisors (1).

212215610562209 is an equidigital number, since it uses as much as digits as its factorization.

212215610562209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 212215610562209 in words is "two hundred twelve trillion, two hundred fifteen billion, six hundred ten million, five hundred sixty-two thousand, two hundred nine".