211701694849 has 2 divisors, whose sum is σ = 211701694850. Its totient is φ = 211701694848.

The previous prime is 211701694817. The next prime is 211701694859. The reversal of 211701694849 is 948496107112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189927741249 + 21773953600 = 435807^2 + 147560^2 .

It is a cyclic number.

It is not a de Polignac number, because 211701694849 - 2⁵ = 211701694817 is a prime.

It is a super-2 number, since 2×211701694849² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211701694796 and 211701694805.

It is not a weakly prime, because it can be changed into another prime (211701694859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105850847424 + 105850847425.

It is an arithmetic number, because the mean of its divisors is an integer number (105850847425).

Almost surely, 2^211701694849 is an apocalyptic number.

It is an amenable number.

211701694849 is a deficient number, since it is larger than the sum of its proper divisors (1).

211701694849 is an equidigital number, since it uses as much as digits as its factorization.

211701694849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 52.

The spelling of 211701694849 in words is "two hundred eleven billion, seven hundred one million, six hundred ninety-four thousand, eight hundred forty-nine".