11801121 has 16 divisors (see below), whose sum is σ = 16278720. Its totient is φ = 7600320.

The previous prime is 11801063. The next prime is 11801129. The reversal of 11801121 is 12110811.

11801121 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11801121 - 2⁷ = 11800993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11801121.

It is not an unprimeable number, because it can be changed into a prime (11801129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10251 + ... + 11343.

It is an arithmetic number, because the mean of its divisors is an integer number (1017420).

Almost surely, 2^11801121 is an apocalyptic number.

It is an amenable number.

11801121 is a deficient number, since it is larger than the sum of its proper divisors (4477599).

11801121 is a wasteful number, since it uses less digits than its factorization.

11801121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216.

The product of its (nonzero) digits is 16, while the sum is 15.

The square root of 11801121 is about 3435.2759714468. The cubic root of 11801121 is about 227.6710206220.

Adding to 11801121 its reverse (12110811), we get a palindrome (23911932).

The spelling of 11801121 in words is "eleven million, eight hundred one thousand, one hundred twenty-one".