211000109197 has 2 divisors, whose sum is σ = 211000109198. Its totient is φ = 211000109196.

The previous prime is 211000109191. The next prime is 211000109249. The reversal of 211000109197 is 791901000112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168123780841 + 42876328356 = 410029^2 + 207066^2 .

It is a cyclic number.

It is not a de Polignac number, because 211000109197 - 2¹⁵ = 211000076429 is a prime.

It is a super-2 number, since 2×211000109197² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211000109191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105500054598 + 105500054599.

It is an arithmetic number, because the mean of its divisors is an integer number (105500054599).

Almost surely, 2^211000109197 is an apocalyptic number.

It is an amenable number.

211000109197 is a deficient number, since it is larger than the sum of its proper divisors (1).

211000109197 is an equidigital number, since it uses as much as digits as its factorization.

211000109197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1134, while the sum is 31.

The spelling of 211000109197 in words is "two hundred eleven billion, one hundred nine thousand, one hundred ninety-seven".