9921012 has 24 divisors (see below), whose sum is σ = 23233056. Its totient is φ = 3295008.

The previous prime is 9921011. The next prime is 9921019. The reversal of 9921012 is 2101299.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9921011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2338 + ... + 5030.

It is an arithmetic number, because the mean of its divisors is an integer number (968044).

Almost surely, 2^9921012 is an apocalyptic number.

It is an amenable number.

9921012 is an abundant number, since it is smaller than the sum of its proper divisors (13312044).

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

9921012 is a wasteful number, since it uses less digits than its factorization.

9921012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007 (or 3005 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 9921012 is about 3149.7638006682. The cubic root of 9921012 is about 214.8747205966.

The spelling of 9921012 in words is "nine million, nine hundred twenty-one thousand, twelve".