210212221230161 has 2 divisors, whose sum is σ = 210212221230162. Its totient is φ = 210212221230160.

The previous prime is 210212221230101. The next prime is 210212221230203. The reversal of 210212221230161 is 161032122212012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192572683227136 + 17639538003025 = 13877056^2 + 4199945^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210212221230161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210212221230161.

It is not a weakly prime, because it can be changed into another prime (210212221230101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105106110615080 + 105106110615081.

It is an arithmetic number, because the mean of its divisors is an integer number (105106110615081).

Almost surely, 2^{210212221230161} is an apocalyptic number.

It is an amenable number.

210212221230161 is a deficient number, since it is larger than the sum of its proper divisors (1).

210212221230161 is an equidigital number, since it uses as much as digits as its factorization.

210212221230161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 210212221230161 its reverse (161032122212012), we get a palindrome (371244343442173).

The spelling of 210212221230161 in words is "two hundred ten trillion, two hundred twelve billion, two hundred twenty-one million, two hundred thirty thousand, one hundred sixty-one".