9921201 has 4 divisors (see below), whose sum is σ = 13228272. Its totient is φ = 6614132.

The previous prime is 9921199. The next prime is 9921227. The reversal of 9921201 is 1021299.

9921201 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9921201 - 2¹ = 9921199 is a prime.

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, 1653531 + ... + 1653536.

It is an arithmetic number, because the mean of its divisors is an integer number (3307068).

Almost surely, 2^9921201 is an apocalyptic number.

It is an amenable number.

9921201 is a deficient number, since it is larger than the sum of its proper divisors (3307071).

9921201 is a wasteful number, since it uses less digits than its factorization.

9921201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307070.

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

The square root of 9921201 is about 3149.7938027750. The cubic root of 9921201 is about 214.8760850765.

The spelling of 9921201 in words is "nine million, nine hundred twenty-one thousand, two hundred one".