9921011000 has 32 divisors (see below), whose sum is σ = 23215168080. Its totient is φ = 3968404000.

The previous prime is 9921010993. The next prime is 9921011017. The reversal of 9921011000 is 1101299.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4959506 + ... + 4961505.

Almost surely, 2^9921011000 is an apocalyptic number.

It is an amenable number.

9921011000 is an abundant number, since it is smaller than the sum of its proper divisors (13294157080).

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

9921011000 is a wasteful number, since it uses less digits than its factorization.

9921011000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9921032 (or 9921018 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 9921011000 is about 99604.2719967372. The cubic root of 9921011000 is about 2148.7471337711.

Adding to 9921011000 its reverse (1101299), we get a palindrome (9922112299).

The spelling of 9921011000 in words is "nine billion, nine hundred twenty-one million, eleven thousand".