212215610562161 has 2 divisors, whose sum is σ = 212215610562162. Its totient is φ = 212215610562160.

The previous prime is 212215610562113. The next prime is 212215610562209. The reversal of 212215610562161 is 161265016512212.

It is a balanced prime because it is at equal distance from previous prime (212215610562113) and next prime (212215610562209).

It can be written as a sum of positive squares in only one way, i.e., 172660756321936 + 39554854240225 = 13140044^2 + 6289265^2 .

It is a cyclic number.

It is not a de Polignac number, because 212215610562161 - 2⁴⁶ = 141846866384497 is a prime.

It is not a weakly prime, because it can be changed into another prime (212215610562961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106107805281080 + 106107805281081.

It is an arithmetic number, because the mean of its divisors is an integer number (106107805281081).

Almost surely, 2^{212215610562161} is an apocalyptic number.

It is an amenable number.

212215610562161 is a deficient number, since it is larger than the sum of its proper divisors (1).

212215610562161 is an equidigital number, since it uses as much as digits as its factorization.

212215610562161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 212215610562161 in words is "two hundred twelve trillion, two hundred fifteen billion, six hundred ten million, five hundred sixty-two thousand, one hundred sixty-one".