9991122102211 has 4 divisors (see below), whose sum is σ = 9991242913392. Its totient is φ = 9991001291032.

The previous prime is 9991122102209. The next prime is 9991122102217. The reversal of 9991122102211 is 1122012211999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 9991122102211 - 2¹ = 9991122102209 is a prime.

It is a super-2 number, since 2×9991122102211² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9991122102217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60281455 + ... + 60446968.

It is an arithmetic number, because the mean of its divisors is an integer number (2497810728348).

Almost surely, 2^{9991122102211} is an apocalyptic number.

9991122102211 is a deficient number, since it is larger than the sum of its proper divisors (120811181).

9991122102211 is a wasteful number, since it uses less digits than its factorization.

9991122102211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120811180.

The product of its (nonzero) digits is 11664, while the sum is 40.

The spelling of 9991122102211 in words is "nine trillion, nine hundred ninety-one billion, one hundred twenty-two million, one hundred two thousand, two hundred eleven".