211223303197 has 2 divisors, whose sum is σ = 211223303198. Its totient is φ = 211223303196.

The previous prime is 211223303141. The next prime is 211223303201. The reversal of 211223303197 is 791303322112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171802789081 + 39420514116 = 414491^2 + 198546^2 .

It is a cyclic number.

It is not a de Polignac number, because 211223303197 - 2²⁷ = 211089085469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211223303897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105611651598 + 105611651599.

It is an arithmetic number, because the mean of its divisors is an integer number (105611651599).

Almost surely, 2^211223303197 is an apocalyptic number.

It is an amenable number.

211223303197 is a deficient number, since it is larger than the sum of its proper divisors (1).

211223303197 is an equidigital number, since it uses as much as digits as its factorization.

211223303197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The spelling of 211223303197 in words is "two hundred eleven billion, two hundred twenty-three million, three hundred three thousand, one hundred ninety-seven".