211222001747857 has 2 divisors, whose sum is σ = 211222001747858. Its totient is φ = 211222001747856.

The previous prime is 211222001747843. The next prime is 211222001747863. The reversal of 211222001747857 is 758747100222112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210098096447121 + 1123905300736 = 14494761^2 + 1060144^2 .

It is a cyclic number.

It is not a de Polignac number, because 211222001747857 - 2¹¹ = 211222001745809 is a prime.

It is a super-2 number, since 2×211222001747857² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211222001747857.

It is not a weakly prime, because it can be changed into another prime (211222001247857) 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, 105611000873928 + 105611000873929.

It is an arithmetic number, because the mean of its divisors is an integer number (105611000873929).

Almost surely, 2^{211222001747857} is an apocalyptic number.

It is an amenable number.

211222001747857 is a deficient number, since it is larger than the sum of its proper divisors (1).

211222001747857 is an equidigital number, since it uses as much as digits as its factorization.

211222001747857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 878080, while the sum is 49.

Adding to 211222001747857 its reverse (758747100222112), we get a palindrome (969969101969969).

The spelling of 211222001747857 in words is "two hundred eleven trillion, two hundred twenty-two billion, one million, seven hundred forty-seven thousand, eight hundred fifty-seven".