211198937268197 has 2 divisors, whose sum is σ = 211198937268198. Its totient is φ = 211198937268196.

The previous prime is 211198937268161. The next prime is 211198937268203. The reversal of 211198937268197 is 791862739891112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197301184403236 + 13897752864961 = 14046394^2 + 3727969^2 .

It is a cyclic number.

It is not a de Polignac number, because 211198937268197 - 2¹⁶ = 211198937202661 is a prime.

It is a super-2 number, since 2×211198937268197² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211198937268107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105599468634098 + 105599468634099.

It is an arithmetic number, because the mean of its divisors is an integer number (105599468634099).

Almost surely, 2^{211198937268197} is an apocalyptic number.

It is an amenable number.

211198937268197 is a deficient number, since it is larger than the sum of its proper divisors (1).

211198937268197 is an equidigital number, since it uses as much as digits as its factorization.

211198937268197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164602368, while the sum is 74.

The spelling of 211198937268197 in words is "two hundred eleven trillion, one hundred ninety-eight billion, nine hundred thirty-seven million, two hundred sixty-eight thousand, one hundred ninety-seven".