9991303210211 has 2 divisors, whose sum is σ = 9991303210212. Its totient is φ = 9991303210210.

The previous prime is 9991303210193. The next prime is 9991303210297. The reversal of 9991303210211 is 1120123031999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9991303210211 - 2¹⁰ = 9991303209187 is a prime.

It is a super-2 number, since 2×9991303210211² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9991303210111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4995651605105 + 4995651605106.

It is an arithmetic number, because the mean of its divisors is an integer number (4995651605106).

Almost surely, 2^{9991303210211} is an apocalyptic number.

9991303210211 is a deficient number, since it is larger than the sum of its proper divisors (1).

9991303210211 is an equidigital number, since it uses as much as digits as its factorization.

9991303210211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 41.

The spelling of 9991303210211 in words is "nine trillion, nine hundred ninety-one billion, three hundred three million, two hundred ten thousand, two hundred eleven".