9121797211 has 2 divisors, whose sum is σ = 9121797212. Its totient is φ = 9121797210.

The previous prime is 9121797169. The next prime is 9121797227. The reversal of 9121797211 is 1127971219.

It is a strong prime.

It is an emirp because it is prime and its reverse (1127971219) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9121797211 - 2¹⁷ = 9121666139 is a prime.

It is not a weakly prime, because it can be changed into another prime (9121797911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560898605 + 4560898606.

It is an arithmetic number, because the mean of its divisors is an integer number (4560898606).

Almost surely, 2^9121797211 is an apocalyptic number.

9121797211 is a deficient number, since it is larger than the sum of its proper divisors (1).

9121797211 is an equidigital number, since it uses as much as digits as its factorization.

9121797211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 40.

The square root of 9121797211 is about 95508.1002376238. The cubic root of 9121797211 is about 2089.4250848029.

The spelling of 9121797211 in words is "nine billion, one hundred twenty-one million, seven hundred ninety-seven thousand, two hundred eleven".