211663711476923 has 2 divisors, whose sum is σ = 211663711476924. Its totient is φ = 211663711476922.

The previous prime is 211663711476869. The next prime is 211663711476947. The reversal of 211663711476923 is 329674117366112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211663711476923 - 2⁶ = 211663711476859 is a prime.

It is a super-2 number, since 2×211663711476923² (a number of 29 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (211663711470923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105831855738461 + 105831855738462.

It is an arithmetic number, because the mean of its divisors is an integer number (105831855738462).

Almost surely, 2^{211663711476923} is an apocalyptic number.

211663711476923 is a deficient number, since it is larger than the sum of its proper divisors (1).

211663711476923 is an equidigital number, since it uses as much as digits as its factorization.

211663711476923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 59.

The spelling of 211663711476923 in words is "two hundred eleven trillion, six hundred sixty-three billion, seven hundred eleven million, four hundred seventy-six thousand, nine hundred twenty-three".