212110022161 has 2 divisors, whose sum is σ = 212110022162. Its totient is φ = 212110022160.

The previous prime is 212110022107. The next prime is 212110022183. The reversal of 212110022161 is 161220011212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201758180625 + 10351841536 = 449175^2 + 101744^2 .

It is a cyclic number.

It is not a de Polignac number, because 212110022161 - 2²³ = 212101633553 is a prime.

It is a super-2 number, since 2×212110022161² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (212110022101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106055011080 + 106055011081.

It is an arithmetic number, because the mean of its divisors is an integer number (106055011081).

Almost surely, 2^212110022161 is an apocalyptic number.

It is an amenable number.

212110022161 is a deficient number, since it is larger than the sum of its proper divisors (1).

212110022161 is an equidigital number, since it uses as much as digits as its factorization.

212110022161 is an odious number, because the sum of its binary digits is odd.

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

Adding to 212110022161 its reverse (161220011212), we get a palindrome (373330033373).

The spelling of 212110022161 in words is "two hundred twelve billion, one hundred ten million, twenty-two thousand, one hundred sixty-one".