9771121 has 4 divisors (see below), whose sum is σ = 9792000. Its totient is φ = 9750244.

The previous prime is 9771119. The next prime is 9771131. The reversal of 9771121 is 1211779.

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 9771121 - 2¹ = 9771119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9771121.

It is not an unprimeable number, because it can be changed into a prime (9771131) 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, 9721 + ... + 10678.

It is an arithmetic number, because the mean of its divisors is an integer number (2448000).

Almost surely, 2^9771121 is an apocalyptic number.

It is an amenable number.

9771121 is a deficient number, since it is larger than the sum of its proper divisors (20879).

9771121 is a wasteful number, since it uses less digits than its factorization.

9771121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20878.

The product of its digits is 882, while the sum is 28.

The square root of 9771121 is about 3125.8792363110. The cubic root of 9771121 is about 213.7870840666.

The spelling of 9771121 in words is "nine million, seven hundred seventy-one thousand, one hundred twenty-one".