211955214169 has 2 divisors, whose sum is σ = 211955214170. Its totient is φ = 211955214168.

The previous prime is 211955214113. The next prime is 211955214173. The reversal of 211955214169 is 961412559112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211126465225 + 828748944 = 459485^2 + 28788^2 .

It is a cyclic number.

It is not a de Polignac number, because 211955214169 - 2³³ = 203365279577 is a prime.

It is a super-2 number, since 2×211955214169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211955214869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105977607084 + 105977607085.

It is an arithmetic number, because the mean of its divisors is an integer number (105977607085).

Almost surely, 2^211955214169 is an apocalyptic number.

It is an amenable number.

211955214169 is a deficient number, since it is larger than the sum of its proper divisors (1).

211955214169 is an equidigital number, since it uses as much as digits as its factorization.

211955214169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 46.

The spelling of 211955214169 in words is "two hundred eleven billion, nine hundred fifty-five million, two hundred fourteen thousand, one hundred sixty-nine".