211222311131171 has 2 divisors, whose sum is σ = 211222311131172. Its totient is φ = 211222311131170.

The previous prime is 211222311131147. The next prime is 211222311131261. The reversal of 211222311131171 is 171131113222112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211222311131171 is a prime.

It is a super-2 number, since 2×211222311131171² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211222311134171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611155565585 + 105611155565586.

It is an arithmetic number, because the mean of its divisors is an integer number (105611155565586).

Almost surely, 2^{211222311131171} is an apocalyptic number.

211222311131171 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222311131171 is an equidigital number, since it uses as much as digits as its factorization.

211222311131171 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 29.

Adding to 211222311131171 its reverse (171131113222112), we get a palindrome (382353424353283).

The spelling of 211222311131171 in words is "two hundred eleven trillion, two hundred twenty-two billion, three hundred eleven million, one hundred thirty-one thousand, one hundred seventy-one".