211200123021247 has 2 divisors, whose sum is σ = 211200123021248. Its totient is φ = 211200123021246.

The previous prime is 211200123021193. The next prime is 211200123021289. The reversal of 211200123021247 is 742120321002112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211200123021247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211200123022247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600061510623 + 105600061510624.

It is an arithmetic number, because the mean of its divisors is an integer number (105600061510624).

Almost surely, 2^{211200123021247} is an apocalyptic number.

211200123021247 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200123021247 is an equidigital number, since it uses as much as digits as its factorization.

211200123021247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

Adding to 211200123021247 its reverse (742120321002112), we get a palindrome (953320444023359).

The spelling of 211200123021247 in words is "two hundred eleven trillion, two hundred billion, one hundred twenty-three million, twenty-one thousand, two hundred forty-seven".