211403121317 has 2 divisors, whose sum is σ = 211403121318. Its totient is φ = 211403121316.

The previous prime is 211403121299. The next prime is 211403121329. The reversal of 211403121317 is 713121304112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210058139041 + 1344982276 = 458321^2 + 36674^2 .

It is a cyclic number.

It is not a de Polignac number, because 211403121317 - 2¹⁰ = 211403120293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211403121217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105701560658 + 105701560659.

It is an arithmetic number, because the mean of its divisors is an integer number (105701560659).

Almost surely, 2^211403121317 is an apocalyptic number.

It is an amenable number.

211403121317 is a deficient number, since it is larger than the sum of its proper divisors (1).

211403121317 is an equidigital number, since it uses as much as digits as its factorization.

211403121317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

Adding to 211403121317 its reverse (713121304112), we get a palindrome (924524425429).

The spelling of 211403121317 in words is "two hundred eleven billion, four hundred three million, one hundred twenty-one thousand, three hundred seventeen".