9991122102212 has 96 divisors (see below), whose sum is σ = 19394741399040. Its totient is φ = 4484113920000.

The previous prime is 9991122102209. The next prime is 9991122102217. The reversal of 9991122102212 is 2122012211999.

It is a super-2 number, since 2×9991122102212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 9991122102212.

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 31 ways as a sum of consecutive naturals, for example, 22020887 + ... + 22470017.

It is an arithmetic number, because the mean of its divisors is an integer number (202028556240).

Almost surely, 2^{9991122102212} is an apocalyptic number.

It is an amenable number.

9991122102212 is a deficient number, since it is larger than the sum of its proper divisors (9403619296828).

9991122102212 is a wasteful number, since it uses less digits than its factorization.

9991122102212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449373 (or 449371 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 9991122102212 in words is "nine trillion, nine hundred ninety-one billion, one hundred twenty-two million, one hundred two thousand, two hundred twelve".