9901220012112 has 320 divisors, whose sum is σ = 31174342214400. Its totient is φ = 2666475356160.

The previous prime is 9901220012111. The next prime is 9901220012137. The reversal of 9901220012112 is 2112100221099.

It is a self number, because there is not a number n which added to its sum of digits gives 9901220012112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9901220012111) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 70196314 + ... + 70337222.

It is an arithmetic number, because the mean of its divisors is an integer number (97419819420).

Almost surely, 2^{9901220012112} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9901220012112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15587171107200).

9901220012112 is an abundant number, since it is smaller than the sum of its proper divisors (21273122202288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9901220012112 is a wasteful number, since it uses less digits than its factorization.

9901220012112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141326 (or 141320 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 9901220012112 in words is "nine trillion, nine hundred one billion, two hundred twenty million, twelve thousand, one hundred twelve".