212211002161 has 2 divisors, whose sum is σ = 212211002162. Its totient is φ = 212211002160.

The previous prime is 212211002149. The next prime is 212211002191. The reversal of 212211002161 is 161200112212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156163280625 + 56047721536 = 395175^2 + 236744^2 .

It is a cyclic number.

It is not a de Polignac number, because 212211002161 - 2³¹ = 210063518513 is a prime.

It is not a weakly prime, because it can be changed into another prime (212211002191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106105501080 + 106105501081.

It is an arithmetic number, because the mean of its divisors is an integer number (106105501081).

Almost surely, 2^212211002161 is an apocalyptic number.

It is an amenable number.

212211002161 is a deficient number, since it is larger than the sum of its proper divisors (1).

212211002161 is an equidigital number, since it uses as much as digits as its factorization.

212211002161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 212211002161 its reverse (161200112212), we get a palindrome (373411114373).

The spelling of 212211002161 in words is "two hundred twelve billion, two hundred eleven million, two thousand, one hundred sixty-one".