9900011212 has 72 divisors (see below), whose sum is σ = 21470912736. Its totient is φ = 3910892544.

The previous prime is 9900011203. The next prime is 9900011243. The reversal of 9900011212 is 2121100099.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5284708 + ... + 5286580.

Almost surely, 2^9900011212 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 9900011212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10735456368).

9900011212 is an abundant number, since it is smaller than the sum of its proper divisors (11570901524).

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

9900011212 is a wasteful number, since it uses less digits than its factorization.

9900011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027 (or 3012 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 9900011212 is about 99498.8000530660. The cubic root of 9900011212 is about 2147.2299796157.

The spelling of 9900011212 in words is "nine billion, nine hundred million, eleven thousand, two hundred twelve".