211663711470923 has 2 divisors, whose sum is σ = 211663711470924. Its totient is φ = 211663711470922.

The previous prime is 211663711470917. The next prime is 211663711470947. The reversal of 211663711470923 is 329074117366112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211663711470923 - 2¹⁸ = 211663711208779 is a prime.

It is a super-2 number, since 2×211663711470923² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211663711470983) 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, 105831855735461 + 105831855735462.

It is an arithmetic number, because the mean of its divisors is an integer number (105831855735462).

Almost surely, 2^{211663711470923} is an apocalyptic number.

211663711470923 is a deficient number, since it is larger than the sum of its proper divisors (1).

211663711470923 is an equidigital number, since it uses as much as digits as its factorization.

211663711470923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 211663711470923 in words is "two hundred eleven trillion, six hundred sixty-three billion, seven hundred eleven million, four hundred seventy thousand, nine hundred twenty-three".