211684797019 has 2 divisors, whose sum is σ = 211684797020. Its totient is φ = 211684797018.

The previous prime is 211684797001. The next prime is 211684797043. The reversal of 211684797019 is 910797486112.

It is a happy number.

211684797019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211684797019 is a prime.

It is a super-2 number, since 2×211684797019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211684797119) 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, 105842398509 + 105842398510.

It is an arithmetic number, because the mean of its divisors is an integer number (105842398510).

Almost surely, 2^211684797019 is an apocalyptic number.

211684797019 is a deficient number, since it is larger than the sum of its proper divisors (1).

211684797019 is an equidigital number, since it uses as much as digits as its factorization.

211684797019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 211684797019 in words is "two hundred eleven billion, six hundred eighty-four million, seven hundred ninety-seven thousand, nineteen".