212202222221161 has 2 divisors, whose sum is σ = 212202222221162. Its totient is φ = 212202222221160.

The previous prime is 212202222220997. The next prime is 212202222221261. The reversal of 212202222221161 is 161122222202212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144205128999936 + 67997093221225 = 12008544^2 + 8246035^2 .

It is a cyclic number.

It is not a de Polignac number, because 212202222221161 - 2⁹ = 212202222220649 is a prime.

It is not a weakly prime, because it can be changed into another prime (212202222221261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106101111110580 + 106101111110581.

It is an arithmetic number, because the mean of its divisors is an integer number (106101111110581).

Almost surely, 2^{212202222221161} is an apocalyptic number.

It is an amenable number.

212202222221161 is a deficient number, since it is larger than the sum of its proper divisors (1).

212202222221161 is an equidigital number, since it uses as much as digits as its factorization.

212202222221161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 28.

Adding to 212202222221161 its reverse (161122222202212), we get a palindrome (373324444423373).

The spelling of 212202222221161 in words is "two hundred twelve trillion, two hundred two billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred sixty-one".