9921101 has 4 divisors (see below), whose sum is σ = 10083804. Its totient is φ = 9758400.

The previous prime is 9921053. The next prime is 9921133. The reversal of 9921101 is 1011299.

9921101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1011299 = 47 ⋅21517.

It can be written as a sum of positive squares in 2 ways, for example, as 249001 + 9672100 = 499^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 9921101 - 2²² = 5726797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9921001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81260 + ... + 81381.

It is an arithmetic number, because the mean of its divisors is an integer number (2520951).

Almost surely, 2^9921101 is an apocalyptic number.

It is an amenable number.

9921101 is a deficient number, since it is larger than the sum of its proper divisors (162703).

9921101 is a wasteful number, since it uses less digits than its factorization.

9921101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162702.

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

The square root of 9921101 is about 3149.7779286801. Note that the first 3 decimals coincide. The cubic root of 9921101 is about 214.8753631316.

The spelling of 9921101 in words is "nine million, nine hundred twenty-one thousand, one hundred one".