211222203161 has 2 divisors, whose sum is σ = 211222203162. Its totient is φ = 211222203160.

The previous prime is 211222203113. The next prime is 211222203193. The reversal of 211222203161 is 161302222112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211214695561 + 7507600 = 459581^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222203161 - 2¹⁰ = 211222202137 is a prime.

It is a super-2 number, since 2×211222203161² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211222203761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611101580 + 105611101581.

It is an arithmetic number, because the mean of its divisors is an integer number (105611101581).

Almost surely, 2^211222203161 is an apocalyptic number.

It is an amenable number.

211222203161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222203161 is an equidigital number, since it uses as much as digits as its factorization.

211222203161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 211222203161 its reverse (161302222112), we get a palindrome (372524425273).

The spelling of 211222203161 in words is "two hundred eleven billion, two hundred twenty-two million, two hundred three thousand, one hundred sixty-one".